Crypto platforms could soon face a new set of hurdles to hold digital assets owned by clients of hedge funds and private equity firms in the U.S. The Securities and Exchange Commission on Wednesday proposed expanding its “qualified custodian” requirements to cover a range of assets, including virtual currencies. The broad changes to those long-standing rules might hit the crypto industry particularly hard as it continues to reel from a regulatory crackdown. Watchdog concerns over the safety of investors' tokens held by crypto platforms was heightened after a series of meltdowns last year, including FTX's wipeout in November.