Its safe to assume that this is just a mere speculation. How could you say you'd learned it as we can checked the blockchain explorer for those top wallets holding tons of bitcoin doesn't have a wallet with million accumulation alone. That's gonna be a huge money and a person holding a million of BTC is gonna be a top position to either dump or pump it on market.

If there is one and that is ko other than Satoshi but he surely dispersed it through different wallet as precautions.