Bank accounts are already controlled by governments, so moving money between fiat and bitcoin will always cause trouble for that reason.
By mentioning trouble I meant taxes. If you want to exchange two currencies such as euro with dollar, no matter what, you just don’t pay any taxes including forex acc, if you happen to have any profits. Why it is diferent with bitcoin? You see what’s the diference? It’s this whole decentralized system. Goverment doesn’t like decentralized, otherwise they would tread it just like any other currency.