there's a comment here from a guy who says they shut down his $80,000 account and have blanked him ever since.

https://zycrypto.com/proof-of-keys-hitbtc-reportedly-restricting-withdrawals-is-john-mcafee-right-that-crypto-users-should-boycott-the-exchange/

i don't understand why anyone would risk that much on a nothing exchange but i guess we're all different.