Considering all of this, if you buy Regeneron shares, plan to buy and hold for the long term. And do so only if you're confident in this biotech company 's pipeline and already marketed products. It's possible that investing in Regeneron today will make you rich years down the road, if product sales continue to rise and the pipeline produces successful drug candidates. And if regulators approve REGN-COV2, you may be on your way to getting rich a little sooner than expected.