It is a simple misconception that some people have that they think they can earn money from gambling that too with a very small bankroll, people that have some money should look for other ways to make money with it instead of wasting it on gambling because gambling is a game of luck and it isn't for making money, you might have some fun and might even manage to win something but there is nothing guaranteed.

Getting 2x of your bankroll in a day should be more than enough from gambling because gambling generally doesn't pay out as much as it takes from you, the house edge will barely let you win in the long run unless you exit quickly after you win something big.