I am very uncomfortable leaving more than $2,000 on a
poker site. So every time I build my roll over $2,000 I withdraw back down to $1,500 and keep playing. Those withdraws go into my savings account to use for whatever I might want in the future.
For live games, my goal is to build a roll up to $10,000. I'm nowhere close yet, but if I get there I will do something very similar to online. Build it up past $10,000 and place the rest in savings.