Trading coins as a side job? Listen to my advice first. The speed of earning and losing is vastly different; doubling a million is hard, but losing half is easy. When trading, be cautious and don't get carried away by small profits. Price fluctuations are common and not beneficial for your wallet. With a million in funds, earning a hundred thousand on the first day and losing ninety thousand the next feels like no gain at all, so patience is necessary; don't be swayed by volatility. Don't rejoice in years of profit; once you incur losses, your funds can shrink significantly. Being wise about when to enter and exit is paramount. Greed is not advisable; even if you earn a lot with a million in funds over the years, it will eventually come to an end. Seeking stability is the way to achieve long-term profits, with an annualized return of about 25%; you could multiply your investment several times over ten years, but this requires real skill and patience. Costs must also be considered; buying high and selling low can lower costs, so precise calculations are needed. After making a profit, it's advisable to take some profits early; if you gain a hundred thousand from a million, consider selling part of it. During a market crash, observe the coins you hold; if the decline is small or large investors are supporting the price, you can hold on for a potential rise.