Basically, when a business or trade does not know its science, it will definitely be dangerous, but if those who trade and do business already know its science, they will definitely get profit. Cryptocurrency is also the same as regular trading if we know its science, for example, we trade fruits that we sell apples, the apples must be fresh, don't let them rot or sell too late because if you sell too late, you will lose. Bitcoin trading is the same, we must dare to Take Profit before the price of Bitcoin drops which results in our portfolio being minus.
And there's more, don't ever trade with altcoins that don't have a very good or clear vision and mission because it will cause our money to be lost. If we only trade and invest in Bitcoin, then what is crucial is the time to buy and the time to sell because Bitcoin is a coin that is fought over by many people, unlike altcoins which can turn into a scam dead coin today, tomorrow or the day after tomorrow.