@Tnoy30 all lost private keys are lost Bitcoins, there is no way to get them back in any way, not even with quantum technology as I have read on some sites. And no one intends to expand the total supply of Bitcoin, it would not only go against the initial plan of Satoshi but it would also cause the economic value of Bitcoin to fall. Lost private keys cannot be recovered, and there are and will be 21,000,000 Bitcoins.