The fastest payment method for casinos is cryptocurrency. The fastest payout casino can transfer your winnings into cryptocurrency almost instantly, and other payment methods remain consistently slower. Even when you use cryptocurrency, some casinos may still take up to 48 hours to process your withdrawal.

First of all, you won't be able to withdraw any winnings that you make with your free play balance. This is because the free play balance isn't real money, it's just a way for the bookies to get you started.

Let X_t+1 = X_t b_t where +b_t and -b_t occur with equal probability b_t is measurable !1_t, and the outcome b_t is measurable !1_t+1 (in other words, my "bet" b_t can only depend on what has happened so far and not on the future, but my knowledge !1_t includes the outcome of all past bets). Then {X_t|!1_t} is a martingale.

The Martingale System is commonly compared to betting in a casino with the hopes of breaking even. When a gambler who uses this method experiences a loss, they immediately double the size of the next bet. By repeatedly doubling the bet when they lose, the gambler, in theory, will eventually even out with a win.