That's a great trick to not force yourself to be greedy. I am also doing the same thing but in my case I only start with a 0.005 BTC bankroll and every time I doubled it, say I get 0.01 btc already I'll withdraw half of it and play again with the othe half and then try to double it up again. So far it works with just minimal bets. I don't wan to bet high.

Always check the history first so you could expect whats coming in the next round if the graph hits a high multiplier expect crashing at 1.xx or 0 on the future rounds. This is only my observation when i play here.