Let's give an example of you bought 100 BTC at 9000$ Price and the price went 9010$ in seconds then you sold, so your profit will be 1000$, may 500$ fees, but the another 500$ you made it profit in seconds!
Let's discuss at the point!
You made it sound so easy but we have to face reality and be more realistic here owning 100 BTC or even 10 is so damn hard for a normal person so how could they get rich quickly on your given example?
You also didn't put up the risk on doing this quick trades like it would always go up when we buy it things could also end up the other way so we should know more and give a realistic example and explanation to properly guide the newbies about crypto or Bitcoin.
If this is how you would present or teach newbie's on how to earn in crypto then I hope you haven't started recruiting others to invest because they could certainly lose their investment instead of earning here.