Having been in the crypto world for 9 years and navigating the contract market for so long, I have exchanged real money for three of the most practical lessons, which I share with brothers still fighting.

First: Always protect the profits you make.
Don't always dream of catching the highest point.
When the price rises by 10%, be alert; when it returns near the cost basis, decisively sell some.
Lock in half at a 20% profit, and at least secure 15% when earning 30%.