Back in 2020, $100 in March 2020 could buy 0.02 btc then. In March 2021, $100 will be $1,200, and in March 2022 $100 will be $800. Then how can you not imagine the potential profits that could be made in the years to come with that $100 if bitcoin hit ATH again or went up to $40K or $50K?
People don't have to be too greedy about investing, they just do it for whatever they can afford to lose. $100 could become $200 if the bitcoin price doubled from now and that is a possibility that can still be believed to be achieved this year and years to come.
That's human beings let alone beginners. They just want the beautiful. $100 is a lot of money, not losing with that money is a good move. They are too thinking about how to make an advantage. But they don't think how they don't lose capital, and leave profit money for trading.
A beginner should learn that. They should be aware of how great the risks of trading are. They must understand managing their funds. If they learners should be ready to lose money and ready to return their lost money. The point is that they must learn, survive and dare to lose.