1 - You buy an asset and it starts to fall.
Solution: You don't buy everything at once, buy a little, if it falls you buy more 👍.
2 - You sell the asset and the price starts to rise.
Solution: You are already in profit, as long as you don't keep thinking you lost something and try to buy it again (Many lose here, you buy again and the price falls), move on to the next asset. Or sell little by little (but if you're in profit, why risk it)
3 - Holding an asset you lost confidence in, because it's only falling.
Solution: Sell, don't wait for a miracle, if you don't trust it, then others don't either.
These are some observations I made while trying to make some trades. Don't follow my advice, create your own strategy.