Don't listen to the idiots who don't know anything about daytrading.
Yes, you can make money doing it. As you know, it's very intense and you can never really take a vacation or day off or anything because you're always thinking "what if this is the moment that an awesome situation comes up and SH*T I might miss it". If you can deal with that intensity then good for you, go for it.
Okay, the climate could change and daytrading become less profitable. Well duh, that could happen in any industry - I think a few of us here work with "computers"?? That industry has changed a sh*tload in the 20 years I've been in it, and is going to change a lot more. (Also, the climate could change and daytrading become MORE profitable.)
Like any other business you are in for yourself, you have to consider overhead, expenses, benefits and so on. If the numbers are there then go ahead.
I tried trading for awhile but wasn't tempermentally suited (I kept wanting to reprogram the software and try to figure out what the algorithms are, etc). A lot of the guys from my training group are still doing it (about 6 years) and a couple of them make really really big bucks. They work for it, though.