Singapore-based 3AC is one of the cryptocurrency investors to have run into difficulties following the sharp sell-off. : Crypto hedge fund Three Arrows Capital (3AC) has entered liquidation, a person familiar with the matter told Reuters on Wednesday, in the latest sign of the market downturn hurting the crypto industry. Singapore-based 3AC is one of the higher profile crypto investors to have run into difficulties following the sharp sell-off in the market for digital currencies seen in recent months.