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.
In the case of crypto, counter-opinion is a common thing and often occurs among communities even among crypto users themselves. Although there are always two sides displayed, namely the positive and negative sides, but must be acknowledged that the negative side's "usually" often far more popular but also rapidly becoming viral. But here you're just leaning on the negative side, so you're only able to look at it with one eye to the enormity of the positive benefits it has brought. If you continue to hold on to your negative standpoint which is not objective, I think you will be left far behind, because you are not smart in utilizing the potential that exists in cryptocurrency.
