This kind of replacement without any doubt is what the authorities have been nursing, but how disappointed they all would be at the end of the day. The wide spread acceptance of bitcoin was not for the fun of it, but hinges on the fact that bitcoin is a revolution that arrested the  financial colonialism people have been subjected to overtime and which is what the authorities are fighting tooth and nail to reinstate, but the people are wiser now.

Technology is evolving, so we might someday come into another coin that could replace bitcoin, but it cannot be anything built outside the foundation already in place in bitcoin, especially the ability for transactions to stay decentralized or it never would make it pass bitcoin.