If you haven’t truly experienced a real bull market and a real bear market,

it’s very hard to switch your mindset between bull and bear markets.
The most obvious thing is that you keep trading and keep losing money.
When you imagine it has reached the bottom, you think you can buy the dip, you can open long positions,
and the end result is getting trapped in spot holdings, with you continuously adding to your futures position until it blows up.
Negative people just lie flat and stop moving.
Positive people will find ways to rebuild their funds—trial and error is also a chance for success.