Most people will lose money very fast in this game whether they scalp or do any other form of trading.
Reason? Sadly most people are real dopes ESPECIALLY the one's under 25 years old. They rush into the game, understand little, know even less, and above all don't realise that the people they're trading against have often taken years to perfect their craft.
As an analogy read a few books on the Law then go up against some heavyset lawyers in court and see how you get on. To say you'll be laughed out of court is a gross understatement.
No different with trading but so many think they'll be able to not only match the heavyset traders but take money from them (overtime).
If you want to get into trading and make a real go at it, be prepared to spend YEARS on your craft otherwise it's almost certain that your money will gravitate to the people who have taken the time...