regarding bitcoin. recently there are a lot of bank regulation. if I remember clearly recently gov introduced a rule that private person don't allowed to have more than 150k uah transactions from card to card in a month.
just last year I sold 2k usd cache and put them on my card and then I recieved a call from bank and they asked me to go to the bank and explain income source.  

 Yup. The Ukrainian government is clearly trying to prop up the value of the hryvnia. Certainly not very libertarian of them. But that's understandable during a war that's an existential threat to the country. Currency controls are just another (indirect) form of taxation, and they have damn good reasons to be collecting taxes right now.