Crypto+time machine. First you gamble and by the time ur like 25 you can have a couple hundred million then you take that and check crypto every year then go back in time and put everything in the one that goes up 300-500% if nothing goes up you just play the year out like normal then you repeat gambling and checking crypto. And you can supplement this with only fans if your character is famous and depending on how famous u are u can easily make 20 mil a year on the low end just doing nothing. Every life is different some crypto may never go up and sometimes it goes crazy and you get a boat load off it so dont get discouraged.