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
Trading, scalping or not will have more chances of you of losing it if you're not used to it. The good scalpers even take losses as well and no one can flee from that.
Even no matter how good you but the market sentiment has changed and you can't cope with that, you're going to lose. Well, it's like an inevitable event that you'll have to experience being new or old.