I am here to take a look at the technology of Blockchain - for me as an mathematican it is interessting to read those white papers and see the technology of a decentraliced blockchain evolving through the issues it is facing (... and more or less bad resisting) over the years. Im not here for monetary reason in the first place. Maybe you are right, if you are here to accumulate wealth, stick to long-running-system which have proofen their stability over the years in terms of a currency.

But for me: Even if it is going to implode as you say, it is very interesting from a sientific point of view. Maybe the technology of a decentralised blockchain will not remain as a currency at all in the future - who knows. But im pretty sure it will remain through all the other features which had been and will be implemented on it. But do I really need to explain that - meaning : we are writing on a service which relies on blockchain-technolgy :D I will give a proof of activity to this network by writing this comment! Its more about the technology than its use as a currency XD ... at least for me it is that way ;)