Once the block subsidy goes low enough so that miners will stop mining these useless blockchains, and enough time passes by to make all the stupid greedy people who think that its limited amount of these (useless) "coins" that has value, cool down and realise that repeat of this bubble is not going to happen and that number of greater fools has run out, once only the utility of the network is what remains, people will see that their "coins" are useless and because of it, worthless, and that its always been the actual usability and usefulness of the network, which can only come from increasing capacity, which can only come from scaling, that has actual value, and where more value is going to pour in... so this is just matter of time.