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!
Lol, you will make a flood in market in the case,
When you buy 100 BTC at the moment of price is 9000$
Then the price can go 10,000$ in seconds, this will make all sell, and price will go very low, and if won't happen, then you will sell at 9010$ and the price will go 7000$ or low in seconds,,,
The high amount the high change at price