U.S.A is country with many rich also
they aren't for sure among those that will lose more, at best they will lose those little taxes from who are not declaring bitcoin(i'm wondering how many are actually declaring taxes coming from bitcoin) which could be big if bitcoin reach mainstream, they were also the first to regulate bitcoin
russia also do not want to lose this opportunity and are regulating it, so i think russia is still on track to not lose much from bitcoin if it become big one day