Those who earn massively in trading are the ones who are patient and can wait 1-2 years (or more) before selling. So you earn a lot when you do research, choose a coin, get into it with serious money, and then wait for years. That's how people earn a lot with trading, it's a quick process.
People who wish to earn quickly use leverage or futures trading, but those two are very risky even for experienced traders. In my opinion, both are like gambling, people can earn a lot pretty quickly but the risk is huge. So it's pretty simple, those who want to make a lot of money quickly are exposed to much greater risk than those who invest in projects that have a chance to grow and become more valuable over time.