Having control on bankroll is a good strategy. And 0.05 BTC is a high amount, and i will not take this much risk. Now my Avg betting amount is 0.01 to 0.04 BTC it depends on games. I will play live betting if I lose my bet I will try to get back that loss in same game. In that time my betting amount may increase. One time I played 0.08 BTC to get back just 0.01 BTC and I succeed.
i think 0.05 btc is too high for me, i usually make a bet in about 0.001 btc - 0.005 btc and not more than that amount because i can not accepted if somehow i am getting loss. but if i have to loss in 0.005 btc, i think i can accepted and i will not sad, maybe a little sad because i know that in playing gambling, we can not win in every times we make a bet.