I don't think many people believe (even crypto advocates) that a large number of transactions are going to happen directly on the blockchain. There seem to be t

I don't think many people believe (even crypto advocates) that a large number of transactions are going to happen directly on the blockchain. There seem to be two possible futures for Bitcoin: Either most people will transact their BTC on an energy efficient network separate from the blockchain (like the Lightning network) or they will use BTC as a long-term store of value like gold*, and not use it to buy everyday things like coffee. * Of course, at the moment it's not a very good store of value because of the price volatility. But advocates argue that these are just growing pains.