Sam Bankman-Fried, head of one of the largest cryptocurrency exchanges, FTX, said he and his company still have a "few billion" on hand to shore up struggling firms that could further destabilize the digital asset industry, but that the worst of the liquidity crunch has likely passed. Bankman-Fried has become crypto's white knight in recent weeks, throwing lifelines to digital asset platforms which have faltered as cryptocurrencies prices have cratered.