Not unowned, unattributed. Somebody holds that key, they just haven't introduced themselves. The wallet is public property now, which is the awkward part for them: every coin that moves out of it is a timestamped confession.
And $2.73 million is a quote, not a payout. Part of that stack was minted out of nothing, and a token whose mint gets voided is worth whatever the next buyer still believes. The ETH and the USDC would survive a court. What keeps the rest parked is that spending it is the moment it becomes evidence. That address has more eyes on it than most exchanges.
