Have you gave a try on matched betting?
If you haven't yet, you should, that's a known way to make fast moneys and securely with no risk of losing moneys.
Might seem absurd to have 0% risk of losing moneys on bettings, but that's why is called matched betting and not just betting hehe
my man bitcoin kinda risky move for starting person but if you want quick cash i recommend you to grind on mmorpgs and sell their in game currency no cap i made a fair amount bread out of them but you have to stay on sharp because of the market for that game aaand its not that easy you need to stay all nighter and lets be honest its tiring but commiting in it grants a absolute return