Well, I'll be the only one on this board to say so, but I think that this currency will continue to thrive and serve a purpose.
If we get quantum computing, we no longer have any security, anywhere, and suggesting that will happen in a decade or two seems very speculative anyway. In other words, all of our crypto will be useless, so we'll have bigger problems than bitcoin, hehe.
As to the process of minting new bitcoin, the process automatically gets harder. The algorithm is set up so that there will never be more than some pre-defined number of bitcoin in existence (more than I can say for paper we print). As to getting country based currencies from and to bitcoin, you can do that today on many exchanges, and soon there will be ATM's.
I own $5 worth of bitcoin ( just for fun). Actually, I bought in with $5. I think it might be $50 or $100 now (yep, it fluctuates a lot). I bought in when discussions came up on the crypo boards, early-on.
Governments want desparately for it to fail, so they might find a way to bring it down. I suspect that the volitility will stay high, which keeps confidence low.