Meh, keep it open for as long as it takes to give you a “clean” footprint. If the NSA (or whoever) really want to listen to all of the mundane conversations you have about who is going to cook dinner tonight, let them.
The flip side of that is that you should make sure you have an escape plan for if/when shit hits the fan. Keep a burner and a thumb drive with a preloaded virtual PC that can only access TOR locked away in case you might need it.
As long as you aren’t doing anything sensitive, you’re just adding to the “noise” part of the signal to noise ratio.
