Reasons why a bull market can cause people to lose money: Many people cannot judge the true value of a coin.

1. You think it can reach a market value of 10 million, but in reality, a 1 million market maker has already manipulated it, and you went all in with a large position.

2. You think the market sentiment hasn't peaked yet, so you buy a value coin at a market value of 100 and then sell, only to find out that the market maker drove it up to 10 million.