Rathole away twice your expected value.
Buy in with a $500 chip from another table, ask for $100 red chips, and rathole the $400 green chips you get in your pocket in plain sight. Ploppies do that if they want to set a limit for themselves. When you run out of reds, pull out 4 greens. If you're paid in green chips after a big bet that wins, rathole those greens. When it comes time to color up, pull out all but two green chips from your pocket.