I see the opposite phenomenon, where literally any change or news about any cryptocurrency shows how stupid and terrible cryptocurrencies are, at least as often and as intensely as the phenomenon you're describing.

Price going up? PURE SPECULATION, DRUGS, AND MONEY LAUNDERING.

Price going down? I TOLD YOU IT WAS A BUBBLE THAT WOULD CRASH.

Price staying steady? JUST WAIT, IT'S A BUBBLE BEING HELD AT A PRICE ARTIFICIALLY, EVEN THOUGH I'LL NEVER MAKE A FALSIFIABLE PREDICTION ABOUT WHEN IT WILL CRASH.