This trade may be very complicated for beginners. Even seniors who continue to trade can also suffer losses. Your friend lost money because of the rush and didn't analyze the trading chart carefully.

Maybe I was lucky because of the focus on Bitcoin, and Bitcoin in this year is very high. As a beginner, I recommend focusing on one coin that has a large volume.

Examples are Bitcoin and Ethereum. Given that Bitcoin is now very dominating, you are changing the focus on Bitcoin.