Let's not. "Cryptocurrencies" is a state of affairs that won't exist in ten years.
I hope you're wrong about this. Not that I hope that all the bullshit circus of altcoin is the same as now, but I'm hoping that bitcoin has become a normal thing for people to use in many facets of financial life and if that happens then for sure there are going to be other cryptocurrencies that are going to begin trying to compete with it seriously. At the moment I see altcoins as a distraction, but once bitcoin is really used by many then alternative cryptos are going to become the all important competition to bitcoin which will keep things innovating and moving in the right direction. We don't want monopolies in the long run as these lead to stagnation.
Not really possible, there will always be a demand for crypto currencies now, even if they're worth a super low amount like Doge, it's just too easy to send money with them.
I think you misunderstood what I was trying to say---which is probably my fault. My point is that most of the "cryptocurrencies" are just stoopid today. Altcoins is a distracting circus of nonsense. Most of the general public isn't sure if bitcoin is nonsense. Once most of the general public accepts the utility and innovation of bitcoin, then the altcoins will begin to serve a real purpose because they can challenge the dominance of bitcoin and drive innovation. In my opinion, at the moment, the altcoins are just a distraction. I realize opinions differ on this matter.