You can play online poker. If you play the numbers you can make a steady profit.
Been there, done that. I stopped back in 2010 when it became clear that the US will manage to forbid its citizens to play with everyone else as I assumed the games will become even less profitable.
I imagine that things are even worse now but I haven't looked into it for ages, however if you think there's still money in there then maybe I should investigate.
If it's worth saying but not worth its own thread even in discussion it goes here.