Academia - Research/lecturing.
The pro gambling paid my way through school, allowed me to live well and make some investments but after 6-7 years I found it a bit too repetitive (unstimulating) and very socially restrictive.
I've scaled the betting back a lot now, essentially playing just a few angles that don't take too much time and enjoying watching some sports. Academia is good in that apart from teaching the scheduled classes, I can pretty much work to my own schedule as I did when gambling, but with the advantages of travel for conferences, social relationships etc. It pays less, but I'm happier.
Currently at a university in Copenhagen, but may move to Brisbane to pursue some other research early next year.