If there is a fatal flaw in Bitcoin somewhere, there are hundreds of other attempts to improve upon this idea by forking the code. We will surely see dramatic changes in valuation amongst these different coins as the crypto community develops, but to think that ALL the coins will fail in their game-changer level ambition.. this does not logically follow.

In all possible worlds, individuals will fork Bitcoin and the competition for economically and technically sound digital monies will only increase. And in all possible worlds, individuals will manipulate markets with very low volume, ie. Bitcoin for most/all of its existence.

This is all deterministic. It could not be otherwise.