Just count the amount of time spent at the computer and divide it by your profit over this period of time. You will be surprised how cheap your time is. It flies away in vain, and numerous clicks on the BUY\SELL buttons just create the illusion of vigorous activity. I remember myself how much time I spent on the exchange to earn as much as my friend the holder earned.
This is one thing people often skip, excellent point made! I mean how much we are earning should not determine whether what we are doing is worth it,
we must also consider how much time we are spending and how much effort we are putting behind it. This is the reason why the rich are getting richer because they are able to find others who will work for them while we are happy with a mediocre salary.
I remember someone once said "Fulfill your dreams or someone will hire you to fulfill their own dreams" and I just realize how accurate it is.
Coming back to scalping, it's good no doubt but you must either use bots or have a team under you who do all the manual work while you can just guide them through it. It's a headache trading all day and earning few dollars after burning your eyes in front of the computer all day. Mind you, I was someone who has done scalping in past and I wasn't even aware of this word and used to call it price-trading until recently.