I think the best explanation for the third phenom we see right now is that a lot people made a decent profit in Bitcoins, which gave them new capital to invest in Alt Coins. So the more money we make in trading bitcoins, the more we can invest in other coins. That is probably why alt coins are currently following bitcoins. So correlation is very high as long as both of them are rising. But what is going to happen once bitcoin is falling again? I really hope our alt coins will stay strong.