Bitcoin is the legal in US as far as I am concern. China didn't ban Bitcoin, They just ban any capital outflow, public sale of ICO, and ban crypto mining who misused government subsidy and stealing electricity for mining.
India only ban banks dealing with bitcoins. So there are still a lot grey area which central governments still unsure how to understand or regulate it.
Obviously, some countries taking the 'easy way' out now by set total ban on Bitcoin,
more info,
https://en.wikipedia.org/wiki/Legality_of_bitcoin_by_country_or_territoryhttps://www.lifewire.com/where-is-bitcoin-illegal-4156601