With the little knowledge I have, I have seen a lot of people scalping and making it than those that does a full trading(hours, days) but they tend to lose so easily can we say it greediness or it's not advisable generally
Greediness is a part of human behavior and there is nothing related to scalping. Scalping takes lot of preparation because you are against the time and sometimes you can get quite decent profit hence makes the traders are chasing more winnings thus the greediness leads them to losses. I've tried scalping by myself and it does give you a decent profit if you know when to stop, your good day is not last forever.