Hello 
I was wondering if you have any strategy when betting and what's your biggest lost
Cheers !
Martingale on roulette has been my biggest weapon but even with that I have my limits and if I reach that limit I quit and accept my fate as a loss for the day. What I do is to double up my money anytime I lose a bet, I will keep doubling until I win to recover all my list bet and I do bet on the colors of the roulette whether black or red category. I once lost an equivalent of 230$ and that had been my biggest lost so far.
At least if you reached your bankroll limit you quit and not deposit again. Others have the habit of putting more fund in the bankroll whenever it got emptied. I once gamble and never set a limit and my luck just left me and lost continuously. That was the biggest lost I had, around 0.3 in BTC equivalent. And I never repeat that approach lol.