There's another thread that's dedicated to Cuba, and from what I've read, I didn't get the impression that Bitcoin is about to become legal tender there. Firstly, giving banks the power over crypto market is dangerous because banks aren't normally friendly to cryptos, as cryptos pose a threat to their existence. Secondly, it seems that for now, cryptos are among 'virtual assets', and while there's potential of allowing to use them for commercial transactions, I won't be surprised if that doesn't mean that cryptos will be treated as money for taxation purposes and thus won't be taxed as such.