The dollar can be liked or disliked. The US can be loved or disliked. But it is foolish to deny reality, and regularly whisper the mantras "the dollar is not backed by anything", "dedollarization", "soon the dollar will collapse"
First of all, at least for the simple reason that this currency has the best collateral, and there is no analog even close to it. Even the euro, secured by the power of the EU economy and the same geopolitical power of the EU, cannot compete with the dollar !
But at the same time, I agree that asset diversification is necessary ! And it is very right to divide your investments into different assets - dollar, euro, gold, bitcoin, .....