Bitcoin users continues to increase so that I'm sure someday will be legalised by the government. I think a bitcoin can survive in the future because I am sure one day the world financial system will imitated bitcoin system.
The government of the Japan already started doing that and they are having a good results with that decision and that is why making bitcoin legal will help them to be a better country, Japan is one of the pioneers of bitcoin in terms of accepting and i think other country will follow and their government will do the same for bitcoin to make it legal and have a better financial system than to their fiat.
My country also philippines accept bitcpoin as payment and thats good the two country philippines and japan adapt bitcoin. This is good because many prople there and here have interest to invest bitcoin and the price will cotinously increasing. I believe bitcoin have big future so invest bitcoin now! And make profit from investing.