Crypto currencies are the only real market for money. And there is an evolution going on on this field. That's why a lot of cryptocurrencies are getting higher and higher as more and more people getting in. And there is more and more money pooring in. But there is also and temporarely boom and burst cycle within te long term (in my opinion postive) market trend. I only believe in long term cryptoccurrencies who have good management policies (between miners, users and devellopers) and have a real added market value. Some altcoin will stay, because they add value to the cryptomarket space. But a lot of altcoins probably will not survive. The top 10 list on every cryptocurrency exchange is by the way a temporarely status qua of the best cryptocurrencies of the world.