Most all my bankrolls have been built gradually from winnings. Lost my first bankroll of $200,000 in the 80's, not by playing poker, but by being scammed by my brother no less. Second bankroll of several thousand I lost on Black Friday. Both times I had won more money overall than I'd lost. My current bankroll is $15,000, gradually built up over the last six years. The highest buy ins I play now are $50, so it is possible, but highly improbable, I'll lose my stake from playing poker. I am kind of curious to see how I might unexpectedly lose this stake. Hey, it's only money.