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.
I think even that's a purely luck based thing and I do not think that's too common. Sure you can open a dice game, go all in, play at 2x return, and you may win. If you do that once or twice per day and keep doing and you get like 10 in a row, that would be luck too, nobody says its impossible, I mean look at martingale, we all keep saying that eventually you will have 10 or more losses in a row and lose it all right? Well, that same logic means you could win 10 in a row as well.
It means if you wager 1k, then it will become 2k after first bet, 4 after second, 8 after third, 16 after fourth, 32 after fifth, 64 after sixth, 128 after seventh, 256 after eight, 512 after ninth, and 1+ million dollars after 10 in a row double. But, will you be willing to risk all that money? I personally would never even consider the first one let alone the 10th one.