Other firms expanding into the crypto space, such as Robinhood, have also benefited from recent SEC relief, which this month resulted in an end to an investigation into its crypto business. As of this writing, Robinhood's stock price has risen to $48.86.

Cryptocurrency-linked stocks are paring some of their losses but still broadly declining in Friday intraday trade, with bitcoin trading around $81,000—more than a quarter off its January peak.

That's a recent tally of market value across the cryptocurrency world from CoinMarketCap—down from a peak of $3.72 trillion on Dec. 17. The pullback shows how some of the euphoria stoked by the prospe