"If you think it through you can see it: Euros, dollars and all the other legal tender around the world are only worth because we all agree they are ... and as such, we accept them as trading tokens and carry out hour lives using it.
In that sense, *any* cryptocurrency can become useful. Hell, *anything* can become useful as a trading token - just go through history and check everything that has been used as money throughout humanity's journey Smiley
--------------------------------------------------------------------------------------------------------------------------------------

 Yeah, you should see me explain to people that money has no real value and watch their face contort in all kinds of strange ways. There is actually a need for Crypto as currency and that need is being seen by more people now then in the recent past. So, the idea that the blockchain is the only part of Bitcoin ( or any coin ) that has value is hard to foresee. I think both the token aspect and Technological aspect of Crypto will live on into the future.

 Also, as much as some people would scratch their heads at this idea, there is a good possibility that the US government ( for various reasons ) was initially the creator of Crytocurrency/Blockchain Tech. Think about it, the US knows it's own currency may be in trouble one day and they decide to create a currency online that they can appear to be distant from ( so as not to cause panic on the Dollar )  something they can grow a user base around without undue worry about the dollar and then, if the worst happens and all has gone well, there is already an established base of users and businesses accepting the currency.

 I grant you that the above is my own personal "maybe" and only one possibility out of many, but I do not see the government going to war on Bitcoin or even cash. I see a diversification of something that used to be strictly central and that is giving many people who are established in the old system lots of trouble in understanding.

 The take away is really that what we are eventually going to see is something hybrid between central and decentralized monetary systems and in getting there, there will likely be room for even more "Altcoins" then there are right now.   No one can argue though that blockchain tech is not highly innovative and disruptive, because it is both.