You're very welcome, and thank you! There's no doubt a lot of speculation going on where cryptocurrencies are concerned, but I also have no doubt that there's very real, serious, and broad interest in cryptocurrencies, among individuals, as well as institutions and governments, as an emerging, legitimate asset class. Japan's already formally legalized bitcoin as an acceptable form of payment, Australia is eliminating taxes related to the use of cryptocurrency, and even the United Nations is embracing blockchain. http://www.coindesk.com/the-united-nations-wants-to-accept-ethereum-and-bitcoin-and-soon/. While most of the 700+ extant cryptos will not persist beyond what is a veritable, ongoing, digital gold rush, I think cryptos with or associated with innovative technology (e.g., bitcoin, ethereum, steemit (!), maybe dash, monero, etc., maybe something still on the horizon) will survive, and even the ones that don't ultimately make it will have succeeded in having played a part in introducing and acclimating the world to cryptocurrency and blockchain.