Bitcoin is still a very remarkable computer science experiment (that has become also a social and economical experiment, in ways that surely it was not intended to be).  It was a significant advance towards solving the old problem that it set to solve.  But it did not get there yet.

I am skeptical of its longterm success because it has still many flaws, that its fans, being unable to solve, prefer to call advantages.  To fix those flaws and allow it to achieve its stated goal, we need a few more ingenious inventions; which we cannot guess when oor whether they will be made.

Even if it succeeds, it will be just a cheaper, faster, easier, and maybe safer payment system.  It will not end crime, corruption, opression, hunger, wars, abuses of cops and courts, etc..  Clever technology alone cannot fix social, political, or economical problems.  On the contrary, technology often makes the problems worse.  Which we are seeing with bitcoin...