I actually did withdraw some early on, but I don't recall for what (definitely nothing so responsible as your suggestion). I have since replenished those.

So far, I've been experimenting with how to best use the site and that's led directly to the large balance in my wallet. Also, by not taking anything out, it's easier to keep track of how I'm doing with my SN behavior.

At some point, I'm sure I'll experiment with a profit taking strategy. For now, though, I consider these sats well spent, because I value the site and the contributors so highly.