The article makes one very good point, which is it doesn't matter so much what you think should be popular or valuable, but what people actually want. There are literally endless cryptocurrencies that may or may not have a technical advantage over BTC. Only time will tell how they develop and change the landscape. Faster and better is great but to see real gains, mass market applicability is what will be key. I have a good feeling about Ripple (XRP), Siacoin (SC) and TenX (PAY). I also like Golem, but depends how easy it will be to utilize that blockchain supercomputing power in day-to-day applications like rendering or mapping genomes and such!