Many investors have this psychological account, viewing profitable investments as "successful" accounts, and therefore hope to lock in profits as soon as possible and sell them; Loss making investments are seen as "failed" accounts, and they are unwilling to easily admit their mistakes, hoping to turn losses into profits in the future and continue to hold them.

This is actually a behavioral finance phenomenon, which we call the "disposition effect", referring to investors' tendency to sell profitable investments too early and hold unprofitable investments for too long.

People are more sensitive to losses than to gains, and the pain caused by the same amount of loss far outweighs the happiness brought by the same amount of gain.