Bitcoin will remain valuable in the future and there is nothing going to happen that we have already perceived right form now, even after the entire bitcoin has been mined, nothing changes from the usual that we have, it still remain a profitable asset, decentralized digital currency, miners earned rewards from transaction fees, the values increase base on the demand and supply rate as people are buying and selling, the network remains intact, nodes secured, transaction irreversible and everything remained transparent on the blockchain technology.