I believe that these are only the initial steps of Cryptos. We are not talking here only alternative currencies, as we are used to FIATs, but a whole new technology, which can change the way we work (blockchain tech, smart contrast, internet of things, etc). Just today in my office work I encountered something that could be a smart contract project in everyday life: http://www.etztec.com/
And how many do you think we are globally involved in this?.... https://www.xrpchat.com/topic/4463-huh-there-are-just-3-million-cryptocurrency-users-worldwide/
So yes, for me it is not a bubble, just a technology that will totally burst at some point and become routine. I only wish I have chosen the right Cryptos, Altcoins, how you wanna call them.