Gamblers Fallacy is real, unfortunately. Emotional treatment is destroying the balance sooner or later from my experience, that is why I never continue playing if I lose more than 30 % of the balance in a single game session. 10 BTC is not a small amount but losing it hurts the person and sustainability of the gambling strategy. The classic method of winning bet series is a big illusion like most of the gambling strategies.
That's how gamblers manage themselves, they take bigger risk and believe that they can still win despite the fact that they are not winning most of its sessions. Maybe that's really the destiny of gamblers as gambling house are destine to become richer.
Having a self control is really necessary, the only way to be safe all the time is don't spend what you can afford to lose.
Additionally, you have to be smart and be realistic all the time, it's not possible to win in gambling but most of us are losers, so know your capability.