Contrary to what many people have been screaming for years now, Bitcoin and cryptos in general are not going anywhere, and as you stated things like BTC are more likely to be deemed legal tender then it is to be banned completely. I think by the end of 2018 people are going to realize this quite blatantly as more and more news comes out to cement the fact that these "intangible" assets are in fact currency and will be treated as such on a global scale in the not so distant future.