I was in a Twitter Space today, listening to a very experienced trader. He confidently told everyone to short Bitcoin and altcoins, predicting that BTC was going to drop into the 90K range and that altcoins would dump hard.
So he's not a good enough trader if he's so wrong about the market trend. But the problem is not that he made a mistake and his position was liquidated, but that those who trust him also opened short positions and were also liquidated.