<s>
Bitcoin	B-Protocol
Cash	I-Protocol
is	O
a	O
cryptocurrency	O
that	O
is	O
a	O
fork	B-Application
of	O
Bitcoin	B-Protocol
.	O
</s>
<s>
Bitcoin	B-Protocol
Cash	I-Protocol
is	O
a	O
spin-off	O
or	O
altcoin	O
that	O
was	O
created	O
in	O
2017	O
.	O
</s>
<s>
In	O
November	O
2018	O
,	O
Bitcoin	B-Protocol
Cash	I-Protocol
split	O
further	O
into	O
two	O
cryptocurrencies	O
:	O
Bitcoin	B-Protocol
Cash	I-Protocol
and	O
Bitcoin	B-Protocol
SV	O
.	O
</s>
<s>
Since	O
its	O
inception	O
,	O
Bitcoin	B-Protocol
users	O
had	O
maintained	O
a	O
common	O
set	O
of	O
rules	O
for	O
the	O
cryptocurrency	O
.	O
</s>
<s>
On	O
21	O
July	O
2017	O
,	O
bitcoin	B-Protocol
miners	O
locked-in	O
a	O
software	O
upgrade	O
referred	O
to	O
as	O
Bitcoin	B-Protocol
Improvement	O
Proposal	O
(	O
BIP	O
)	O
91	O
,	O
which	O
meant	O
that	O
the	O
Segregated	O
Witness	O
upgrade	O
would	O
activate	O
at	O
block	O
477,120	O
.	O
</s>
<s>
Segwit	O
controversially	O
would	O
enable	O
second	O
layer	O
solutions	O
on	O
bitcoin	B-Protocol
such	O
as	O
the	O
Lightning	B-Protocol
Network	I-Protocol
.	O
</s>
<s>
A	O
key	O
difference	O
of	O
opinion	O
between	O
Bitcoin	B-Protocol
users	O
was	O
over	O
the	O
running	O
of	O
nodes	O
.	O
</s>
<s>
Bitcoin	B-Protocol
supporters	O
wanted	O
to	O
keep	O
blocks	O
small	O
so	O
that	O
nodes	O
could	O
be	O
operated	O
with	O
less	O
resources	O
,	O
while	O
some	O
large	O
block	O
supporters	O
find	O
it	O
acceptable	O
that	O
(	O
due	O
to	O
large	O
block	O
sizes	O
)	O
,	O
nodes	O
might	O
only	O
be	O
run	O
by	O
universities	O
,	O
private	O
companies	O
and	O
nonprofits	O
.	O
</s>
<s>
A	O
group	O
of	O
bitcoin	B-Protocol
activists	O
,	O
developers	O
,	O
and	O
China-based	O
miners	O
were	O
unhappy	O
with	O
Bitcoin	B-Protocol
's	O
proposed	O
SegWit	O
improvement	O
plans	O
meant	O
to	O
increase	B-Protocol
bitcoin	I-Protocol
's	I-Protocol
capacity	I-Protocol
;	O
these	O
stakeholders	O
pushed	O
forward	O
alternative	O
plans	O
which	O
would	O
increase	O
the	O
block	O
size	O
limit	O
to	O
eight	O
megabytes	O
through	O
a	O
hard	O
fork	B-Application
.	O
</s>
<s>
In	O
June	O
2017	O
,	O
hardware	O
manufacturer	O
Bitmain	O
,	O
described	O
the	O
would-be	O
hard	O
fork	B-Application
with	O
the	O
increased	O
block	O
size	O
as	O
a	O
"	O
contingency	O
plan	O
"	O
,	O
should	O
the	O
bitcoin	B-Protocol
community	O
decide	O
to	O
fork	B-Application
implementing	O
SegWit	O
.	O
</s>
<s>
The	O
first	O
implementation	O
of	O
the	O
software	O
was	O
proposed	O
under	O
the	O
name	O
Bitcoin	B-Protocol
ABC	O
at	O
a	O
conference	O
that	O
month	O
.	O
</s>
<s>
In	O
July	O
2017	O
,	O
mining	B-Protocol
pool	I-Protocol
ViaBTC	O
proposed	O
the	O
name	O
Bitcoin	B-Protocol
Cash	I-Protocol
.	O
</s>
<s>
In	O
July	O
2017	O
Roger	O
Ver	O
and	O
others	O
stated	O
they	O
felt	O
that	O
adopting	O
BIP	O
91	O
(	O
that	O
would	O
later	O
activate	O
SegWit	O
)	O
favored	O
people	O
who	O
wanted	O
to	O
treat	O
bitcoin	B-Protocol
as	O
a	O
digital	O
investment	O
rather	O
than	O
as	O
a	O
transactional	O
currency	O
.	O
</s>
<s>
The	O
fork	B-Application
that	O
created	O
Bitcoin	B-Protocol
Cash	I-Protocol
took	O
effect	O
on	O
1	O
August	O
2017	O
.	O
</s>
<s>
In	O
relation	O
to	O
Bitcoin	B-Protocol
it	O
is	O
characterized	O
variously	O
as	O
a	O
spin-off	O
,	O
a	O
strand	O
,	O
a	O
product	O
of	O
a	O
hard	O
fork	B-Application
,	O
an	O
offshoot	O
,	O
a	O
clone	O
,	O
a	O
second	O
version	O
or	O
an	O
altcoin	O
.	O
</s>
<s>
At	O
the	O
time	O
of	O
the	O
fork	B-Application
anyone	O
owning	O
bitcoin	B-Protocol
came	O
into	O
possession	O
of	O
the	O
same	O
number	O
of	O
Bitcoin	B-Protocol
Cash	I-Protocol
units	O
.	O
</s>
<s>
The	O
technical	O
difference	O
between	O
Bitcoin	B-Protocol
Cash	I-Protocol
and	O
Bitcoin	B-Protocol
is	O
that	O
Bitcoin	B-Protocol
Cash	I-Protocol
allows	O
larger	O
blocks	O
in	O
its	O
blockchain	O
than	O
Bitcoin	B-Protocol
which	O
,	O
in	O
theory	O
,	O
allows	O
it	O
to	O
process	O
more	O
transactions	O
per	O
second	O
.	O
</s>
<s>
Bitcoin	B-Protocol
Cash	I-Protocol
was	O
the	O
first	O
of	O
the	O
Bitcoin	B-Protocol
forks	I-Protocol
,	O
in	O
which	O
software-development	O
teams	O
modified	O
the	O
original	O
Bitcoin	B-Protocol
computer	O
code	O
and	O
released	O
coins	O
with	O
“	O
Bitcoin	B-Protocol
"	O
in	O
their	O
names	O
,	O
with	O
"	O
the	O
goal	O
of	O
creating	O
money	O
out	O
of	O
thin	O
air	O
"	O
.	O
</s>
<s>
On	O
1	O
August	O
2017	O
Bitcoin	B-Protocol
Cash	I-Protocol
began	O
trading	O
at	O
about	O
$240	O
,	O
while	O
bitcoin	B-Protocol
traded	O
at	O
about	O
$	O
2,700	O
.	O
</s>
<s>
In	O
2018	O
Bitcoin	B-Language
Core	I-Language
developer	O
Cory	O
Fields	O
found	O
a	O
bug	O
in	O
the	O
Bitcoin	B-Protocol
ABC	O
software	O
that	O
would	O
have	O
allowed	O
an	O
attacker	O
to	O
create	O
a	O
block	O
causing	O
a	O
chain	O
split	O
.	O
</s>
<s>
In	O
November	O
2020	O
,	O
there	O
was	O
a	O
second	O
contested	O
hard	O
fork	B-Application
where	O
the	O
leading	O
node	O
implementation	O
,	O
BitcoinABC	O
,	O
created	O
BCHA	O
.	O
</s>
<s>
In	O
2017	O
there	O
were	O
two	O
factions	O
of	O
Bitcoin	B-Protocol
supporters	O
:	O
those	O
that	O
supported	O
large	O
blocks	O
and	O
those	O
who	O
preferred	O
small	O
blocks	O
.	O
</s>
<s>
The	O
Bitcoin	B-Protocol
Cash	I-Protocol
faction	O
favors	O
the	O
use	O
of	O
its	O
currency	O
as	O
a	O
medium	O
of	O
exchange	O
for	O
commerce	O
,	O
while	O
the	O
Bitcoin-supporting	O
faction	O
view	O
Bitcoin	B-Protocol
's	O
primary	O
use	O
as	O
that	O
of	O
a	O
store	O
of	O
value	O
.	O
</s>
<s>
Bitcoin	B-Protocol
Cash	I-Protocol
is	O
sometimes	O
also	O
referred	O
to	O
as	O
Bcash	B-Protocol
.	O
</s>
<s>
Bitcoin	B-Protocol
Cash	I-Protocol
detractors	O
call	O
the	O
cryptocurrency	O
"	O
Bcash	B-Protocol
"	O
,	O
"	O
Btrash	O
"	O
,	O
or	O
"	O
a	O
scam	O
"	O
,	O
while	O
its	O
supporters	O
maintain	O
that	O
"	O
it	O
is	O
the	O
pure	O
form	O
of	O
Bitcoin	B-Protocol
"	O
.	O
</s>
<s>
Samson	O
Mow	O
of	O
Blockstream	O
pointed	O
to	O
Bitcoin	B-Protocol
Cash	I-Protocol
's	O
use	O
of	O
the	O
"	O
Bitcoin	B-Protocol
"	O
name	O
as	O
a	O
source	O
of	O
animosity	O
between	O
the	O
Bitcoin	B-Protocol
and	O
Bitcoin	B-Protocol
Cash	I-Protocol
camps	O
.	O
</s>
<s>
Emin	O
Gün	O
Sirer	O
,	O
a	O
professor	O
at	O
Cornell	O
stated	O
that	O
Bitcoin	B-Protocol
Cash	I-Protocol
was	O
focused	O
on	O
use	O
and	O
Bitcoin	B-Protocol
was	O
"	O
enormously	O
"	O
focused	O
on	O
store	O
of	O
value	O
.	O
</s>
<s>
Bitcoin	B-Protocol
Cash	I-Protocol
trades	O
on	O
digital	O
currency	O
exchanges	O
using	O
the	O
Bitcoin	B-Protocol
Cash	I-Protocol
name	O
and	O
the	O
BCH	O
currency	O
code	O
for	O
the	O
cryptocurrency	O
.	O
</s>
<s>
On	O
26	O
March	O
2018	O
,	O
OKEx	O
removed	O
all	O
Bitcoin	B-Protocol
Cash	I-Protocol
trading	O
pairs	O
except	O
for	O
BCH/BTC	O
,	O
BCH/ETH	O
and	O
BCH/USDT	O
due	O
to	O
"	O
inadequate	O
liquidity	O
"	O
.	O
</s>
<s>
,	O
daily	O
transaction	O
numbers	O
for	O
Bitcoin	B-Protocol
Cash	I-Protocol
are	O
about	O
one-tenth	O
of	O
those	O
of	O
bitcoin	B-Protocol
.	O
</s>
<s>
Coinbase	O
listed	O
Bitcoin	B-Protocol
Cash	I-Protocol
on	O
19	O
December	O
2017	O
and	O
the	O
coinbase	O
platform	O
experienced	O
price	O
abnormalities	O
that	O
led	O
to	O
an	O
insider	O
trading	O
investigation	O
.	O
</s>
<s>
As	O
of	O
August	O
2018	O
,	O
Bitcoin	B-Protocol
Cash	I-Protocol
payments	O
are	O
supported	O
by	O
payment	O
service	O
providers	O
such	O
as	O
BitPay	O
,	O
Coinify	O
and	O
GoCoin	O
.	O
</s>
<s>
Bitcoin	B-Protocol
and	O
Bitcoin	B-Protocol
Cash	I-Protocol
both	O
use	O
a	O
proof-of-work	O
algorithm	O
to	O
timestamp	O
every	O
new	O
block	O
.	O
</s>
<s>
Additionally	O
,	O
both	O
Bitcoin	B-Protocol
and	O
Bitcoin	B-Protocol
Cash	I-Protocol
target	O
a	O
new	O
block	O
to	O
be	O
generated	O
every	O
ten	O
minutes	O
on	O
average	O
.	O
</s>
<s>
To	O
keep	O
the	O
block	O
generation	O
time	O
equal	O
to	O
ten	O
minutes	O
on	O
average	O
,	O
both	O
Bitcoin	B-Protocol
and	O
Bitcoin	B-Protocol
Cash	I-Protocol
use	O
an	O
algorithm	O
adjusting	O
the	O
mining	O
difficulty	O
parameter	O
.	O
</s>
<s>
Originally	O
,	O
both	O
Bitcoin	B-Protocol
and	O
Bitcoin	B-Protocol
Cash	I-Protocol
used	O
the	O
same	O
difficulty	O
adjustment	O
algorithm	O
,	O
adjusting	O
the	O
mining	O
difficulty	O
parameter	O
every	O
2016	O
blocks	O
.	O
</s>
<s>
Since	O
1	O
August	O
2017	O
,	O
Bitcoin	B-Protocol
Cash	I-Protocol
also	O
used	O
an	O
addition	O
to	O
the	O
DAA	O
,	O
called	O
an	O
Emergency	O
Difficulty	O
Adjustment	O
(	O
EDA	O
)	O
algorithm	O
.	O
</s>
<s>
EDA	O
was	O
used	O
alongside	O
the	O
original	O
DAA	O
and	O
it	O
was	O
designed	O
to	O
decrease	O
the	O
mining	O
difficulty	O
of	O
Bitcoin	B-Protocol
Cash	I-Protocol
by	O
20%	O
,	O
if	O
the	O
time	O
difference	O
between	O
6	O
successive	O
blocks	O
was	O
greater	O
than	O
12	O
hours	O
.	O
</s>
<s>
EDA	O
adjustments	O
caused	O
instabilities	O
in	O
mining	O
difficulty	O
of	O
the	O
Bitcoin	B-Protocol
Cash	I-Protocol
system	O
,	O
resulting	O
in	O
Bitcoin	B-Protocol
Cash	I-Protocol
being	O
thousands	O
of	O
blocks	O
ahead	O
of	O
Bitcoin	B-Protocol
.	O
</s>
<s>
To	O
address	O
the	O
problem	O
with	O
stability	O
,	O
a	O
change	O
of	O
the	O
Bitcoin	B-Protocol
Cash	I-Protocol
DAA	O
was	O
implemented	O
and	O
the	O
EDA	O
canceled	O
.	O
</s>
<s>
After	O
the	O
change	O
,	O
the	O
Bitcoin	B-Protocol
Cash	I-Protocol
DAA	O
adjusts	O
the	O
mining	O
difficulty	O
after	O
each	O
block	O
.	O
</s>
<s>
To	O
calculate	O
the	O
difficulty	O
for	O
a	O
new	O
block	O
,	O
the	O
Bitcoin	B-Protocol
Cash	I-Protocol
DAA	O
uses	O
a	O
moving	O
window	O
of	O
last	O
144	O
blocks	O
.	O
</s>
<s>
A	O
group	O
of	O
researchers	O
demonstrated	O
that	O
,	O
as	O
of	O
June	O
2019	O
,	O
Bitcoin	B-Protocol
DAA	O
fails	O
to	O
generate	O
new	O
blocks	O
at	O
a	O
constant	O
rate	O
as	O
long	O
as	O
the	O
hash	O
supply	O
is	O
elastic	O
.	O
</s>
<s>
In	O
contrast	O
to	O
that	O
,	O
the	O
group	O
demonstrated	O
that	O
Bitcoin	B-Protocol
Cash	I-Protocol
DAA	O
is	O
stable	O
even	O
when	O
the	O
cryptocurrency	O
price	O
is	O
volatile	O
and	O
the	O
supply	O
of	O
hash	O
power	O
is	O
highly	O
elastic	O
.	O
</s>
<s>
On	O
15	O
November	O
2018	O
,	O
a	O
hard	O
fork	B-Application
chain	O
split	O
of	O
Bitcoin	B-Protocol
Cash	I-Protocol
occurred	O
between	O
two	O
rival	O
factions	O
called	O
Bitcoin	B-Protocol
Cash	I-Protocol
and	O
Bitcoin	B-Protocol
SV	O
.	O
</s>
<s>
On	O
15	O
November	O
2018	O
Bitcoin	B-Protocol
Cash	I-Protocol
traded	O
at	O
about	O
$289	O
,	O
and	O
Bitcoin	B-Protocol
SV	O
traded	O
at	O
about	O
$96.50	O
,	O
down	O
from	O
$425.01	O
on	O
14	O
November	O
for	O
the	O
un-split	O
Bitcoin	B-Protocol
Cash	I-Protocol
.	O
</s>
<s>
The	O
split	O
originated	O
from	O
what	O
was	O
described	O
as	O
a	O
"	O
civil	O
war	O
"	O
in	O
two	O
competing	O
bitcoin	B-Protocol
cash	I-Protocol
camps	O
.	O
</s>
<s>
The	O
first	O
camp	O
,	O
supported	O
by	O
entrepreneur	O
Roger	O
Ver	O
and	O
Jihan	O
Wu	O
of	O
Bitmain	O
,	O
promoted	O
the	O
software	O
entitled	O
Bitcoin	B-Protocol
ABC	O
(	O
short	O
for	O
Adjustable	O
Blocksize	O
Cap	O
)	O
,	O
which	O
would	O
maintain	O
the	O
block	O
size	O
at	O
32MB	O
.	O
</s>
<s>
The	O
second	O
camp	O
led	O
by	O
Craig	O
Steven	O
Wright	O
and	O
billionaire	O
Calvin	O
Ayre	O
put	O
forth	O
a	O
competing	O
software	O
version	O
Bitcoin	B-Protocol
SV	O
,	O
short	O
for	O
"	O
Bitcoin	B-Protocol
Satoshi	O
Vision	O
"	O
,	O
which	O
would	O
increase	O
the	O
block	O
size	O
limit	O
to	O
128MB	O
.	O
</s>
<s>
The	O
Bitcoin	B-Protocol
SV	O
blockchain	O
is	O
the	O
largest	O
of	O
all	O
Bitcoin	B-Protocol
forks	I-Protocol
,	O
exceeding	O
2.5	O
terabytes	O
in	O
size	O
.	O
</s>
