As far as i know you need 2500bb to exclude the possibility of losing all your bankroll at a cash game assuming you have a 4bb/100bb winrate in the worst case scenario. does and if so how it impacts this variance calculation the fact that you and your opponents always buyin for 100bb or if the game is deeper and you and your opponents always buyin for at least 300bb? In other words do you need 2500bb to play safe only in a 100bb deep game or you cannot lose all your 2500bb bankroll if the game is always played deeper than 300bb?