Me? I do have a day job and I consider bitcoin as my side job. I don't want to lose that another source of income just because bitcoin is awesome.
It's not that easy to make a lot of money using bitcoins, but if you try hard enough it isn't impossible. It takes a lot of effort and an innovative mind to get to it, but that's just my opinion.
I think it's a good idea to work on it as a side job but then again, half heartedly attempting to do something isn't something that leads to a lot of success as history has taught us.