Actually, the mainstream coins haven't been positioned much in the past couple of days because altcoins have been quite volatile, making it more suitable to take small risks for big rewards. As long as you catch a coin that surges, you can make a significant profit. The mainstream coins have performed well but their growth is relatively limited, unless the positions are quite large. However, ETH has already broken through an important level, and I will also keep an eye on mainstream coins. The cost-performance ratio is good, and I can launch at any time!