From all the major flaws presented in Bitcoin one could say PoW is the major flaw of them all making the coin more centralized than even most people can't afford to keep up with other miners, these are day traders doing there thing again making profits on your losses, beware most say it's like gold it doesn't need to be fast but in reality it just isn't so secure.
You predict wrongly, in fact the current bitcoin price has reached more than $ 5 thousand and this is not caused by the pump but because of the recovery in market prices so that in the near future the bitcoin price movement has slightly increased