Everyones says you can make money by supplying liquidity on DEXs

Here is what they don't tell you:
When you deposit two tokens into a liquidity pool the pool needs to stay balanced
If one token pumps hard the pool automatically sells it and buys more of the other one
So your pool slowly fills up with the token that's going down
And empties out the token that's going UP
You end up holding more of the loser and less of the winner
This is impermanent loss
And most people only find out about it after they've already lost money wondering why their LP position is worth less than if they just held both tokens