As long as US government not against Bitcoin, it will be OK. I hope US SEC will approve soon the Bitcoin ETF trading, it will be a big deal for cryptocurrency.
USA countries must have calculated the profit and loss against bitcoin, what attitude can all be done that must produce a profit, especially there must be added value for the country, of course America will apply some policies related to bitcoin currency, maybe one of them will implement taxes tight, and various other ways, but certainly the future of bitcoin in America will still be good.