I would to buy the very old one Bitorrent not the new Bitorrent. And I am still not sure whether BTT old is BTTC.
And what's the benefit of buying the old token if the project has already moved on and the BitTorrent ecosystem now relies on the new BTTC token? Since the launch of the mainnet in 2021, the old BTT tokens on TRC10 were migrated to the new BTT (BTTC on Binance) on TRC20.