The first rule of major trading

The position should be light enough to allow you to sleep peacefully. If your holdings are too heavy, greed and fear will follow you like shadows, eroding your trading ability like inner demons. They will tear apart your rationality, disrupt your judgment, making you unable to hold onto the positions you should keep, while selling off the positions you shouldn't sell, ultimately dragging you step by step into the abyss.
The real winners in the market understand how to manage risk by controlling their positions and facing the turbulent market with a calm mindset. Always remember not to over-leverage; true experts never lack capital.