I think bitcoin might not banned in western countries. we see today bitcoin prices continue to rise. probably not many countries even prohibit the use bitcoin. bitcoin might eventually be legalized in the country with a new system
Bitcoin is freedom and there's no government for now who can manipulate or control the bitcoin community. Bitcoin is legal it's just that it hasn't been introduced wordwide.
Even the government release the announcement for banning bitcoin,i believe still have many people use bitcoin.Nothing much compare to the real world.There are no way they can control it or block it.Same like porn.My country has banned many porn site but still,many people can browsing porn via vpn.