$ETH just entered cryptocurrency, doesn't understand any professional knowledge, looked at the ETH price chart for a while and bought a little to test the waters, and it actually went up; unfortunately, I bought too little. When ETH hit a high of 2645, I felt it wouldn't rise further and sold it. I don't understand, so I want to try everything. I hope to get started quickly, and I hope experienced players can give me more guidance. $ETH 丶