On August 7, Morgan Stanley's 15,000 brokers will be able to suggest allocations to two spot bitcoin ETFs from BlackRock Inc. and Fidelity Investments, according to two sources familiar with the company's plans. Morgan Stanley had made bitcoin ETFs available to customers following regulatory approval in January but only on an unsolicited basis, meaning that customers had to ask their advisors to make an investment. It had been exploring solicited sales for several months.