Poland’s second-largest crypto exchange Bitmarket closed up shop on Tuesday, without any prior warning. According to a message posted a day earlier on the Bitmarket’s website, the exchange was forced to cease operations due to loss of liquidity. However, some of its clients suspect that the exchange might have been hacked. As a matter of fact, Bitmarket users have created a thread in Reddit, and share their experience with the exchange. They claim that lately the firm has been acting strangely - asking users to change their passwords (without any given reason) and suspending withdrawals over additional KYC requirements.