Absolutely, people "holding" Bitcoin derive value from the network's popularity, but in the same way they will become worthless when the network ends. Since there's nothing scarce about networks (protocol + hardware + people joining it), there's nothing everlasting about Bitcoin. Same for the USD and all other fiat, as every one ends after a few hundred years. Some Bitcoiners try to call it digital gold, but gold's value has lasted through civilization after civilization.