...not a guaranteed value of the Bitcoin makes the price move is not fair.
Life is not fair. The fact that bitcoin is not guaranteed by state violence is the very reason it will succeed, the very thing that makes it unique from all violence-backed state promissory scrip.
No, bitcoin will not last forever. But it will almost certainly get us through the end of capitalism.
It has been really affiliated with some higher class of elites that has been investing in this kind of currency. And for years, bitcoin is really successful, and every day its community is grwoing and growing. It been successful with less affiliates, how much more if we rode thousands more? We can't tell if bitcoin will really stay for ever, I agree, but we cant make it run long for the future years.