I've done scalping too in 2017. Altcoins vs Bitcoin. It was in the easy days bots weren't so common.
But at some point the profitability dropped big time and the time it consumed made it less profitable than my day job.
I decided to slow down and when I looked more carefully from "outside the box" I've seen that it's risky. Big time. I don't agree with:
Scalping does not require complex analytical approaches to calculate the price, which will be in a month or a year. Bought it, waited from 1 minute to several hours, sold it, etc.
If the market drops, you may easily end up with bags of unwanted coin. And that's why I said that it was risky. And I stopped. It was one of my good decisions, since I didn't get to lose money on that, only time.