Some countries would ban bitcoin as it has a monopoly on money printing and does not want any interference whatsoever. Could you imagine the Federal reserve just letting Bitcoin walk right in and take over? No more milking the populace. They are either in control of Bitcoin (which I think) or Bitcoin will only go so far.
If some state will accept bitcoin or any cryptocurrency therefore they can received a benefit especially increasing income and with that many investors will lived in that state because the state will accept cryptocurrency and it is legal too and that's why in a state will have a bettee economy and developing as the years goes by.