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In my experience I can say with respect to the Martingale that at one point I applied it here at Betfury and at that time the BFG tokens were at a good peak and I lost around 1500BFG which was difficult to recover, at the time the I lost I stopped playing with that strategy, I could get away with 200BFG but when I went over 400BFG I lost and stopped before I had lost everything, so I settled for losing that amount and not all of it, this is something that has to be taken into consideration with regarding the martingale.
Martingale is a very simple technique. I think a lot of new casino players start playing with this strategy. But Martingale is a bad idea to make money gambling. Do you really think the casino algorithms can't recognize it? Developers know many strategies for gambling. So it's useless to use Martingale in the hope of winning big money.