Simple rule: Cryptocurrencies are very volatile - their price can fluctuate greatly. Never invest in cryptocurrencies more than you are willing to lose. This will help avoid stress if the price suddenly drops.
Example: If you invested 100 dollars, and they disappeared, you shouldn't worry too much if that was an amount you weren't afraid to lose.
Don't chase quick money.
Beginner's mistake: Many beginners try to make quick money by buying cryptocurrencies when the price suddenly rises or selling when they see the price drop.
Advice: It is best to approach cryptocurrencies as a long-term investment. If you follow 'quick' strategies, it can lead to losses. Patience is an important part of successful trading.