If you know when to sell your investment (not just in crypto, in real world too) you will be rich soon. Trading is an art in my opinion. All i can see is if You are not greedy you will earn some money. Not too much not too little but enough.
in investing you should know it. and has a plan for the right time to sell your assets. usually those who use this method are long-term investments. they determine their time and profits. or choose one of them. not the most important thing like trading. because investment does analysis to get maximum profit.