In a bull market, it is easier to lose money.
In a bull market, not only is the risk of loss higher, but it is often "unnecessary loss", that is, unnecessary loss caused by emotional fluctuations or deviation from strategy.
In a bear market, the price fluctuation is small and liquidity is limited. It may only fall by 10% in half a month. The loss process is relatively slow, similar to "boiling a frog in warm water". In a bull market, the price fluctuates violently and liquidity is sufficient. An hourly K line may fluctuate by more than 5%.
If you do not follow the trading strategy and enter the market at will, you will often encounter a situation where the price rebounds just after the stop loss, or short when the price weakens briefly, but is caught off guard by the subsequent pull-up.
Such "unnecessary loss" is particularly easy to make people unbalanced, trigger emotional fluctuations, and then cause operations to deviate from the strategy, and fall into a vicious cycle of increasing losses.