Where is it going to be safest? Erm, well, the centre of the stage, right? Exactly, it makes perfect sense. At least, from a defensive standpoint. Being in the centre in Bumper.io is a bit like hiding in buildings for the entire game in PUBG. Yes, it's possible, and a decent strategy to win, but doesn't make for the most intense gameplay experience. At all. Moving away from the centre is best for offense, but of course can leave you vulnerable. Though, if in the final moments you're going against a larger enemy than you, you won't likely last long.