Dead wallet means the private key to it is likely lost so nobody has access to it. Though there's always a chance someone actually still has it, so you can neve

Dead wallet means the private key to it is likely lost so nobody has access to it. Though there's always a chance someone actually still has it, so you can never say with certainty that a wallet is dead. As for supply limitation, the current market cap of BTC is USD 860B, so this is 0.0001%.