So lets say you're earning $50K from your trading strategy.
If you put $1.5 million into a diversified portfolio of stocks and bonds you can probably earn 3%. Sure there will be ups and downs, but the flow of dividends and coupons would be reasonably safe. So that's another $45,000. Total of $95K: would that be enough? (there will be taxes of course)
This is pretty much how I organise my own investments. Although my trading strategy is incredibly scalable, its much safer if you aren't relying entirely on your trading strategy. If it doesn't work in one or two years you need something to fall back on.
Personally I don't think you'd learn anything from a prop shop: you're already doing very well. If this all still sounds too risky then can you suck up the high paying office job for a few more years? Maybe by then with trading income and growth in your diversified portfolio you'd have $3 million in your diversified portfolio; $90K plus $50K... would that be enough?
Just one more piece of advice if you're going down this route set your "F... You Money" target and stick to it. If I hadn't done that I'd still be working...
GAT
Good advice there, 3% just seems a little low for the diversified portfolio.
Anyway early thirties, a good job, 2 mil in the bank plus a profitable system for 25% of that money, that's a pretty good place to be, probably several options would work out fine (but sure as mentioned before, if you can avoid it, don't park your savings in a fragile institution)