Altcoins prices push the price of bitcoin up and down !!
if Altcoin is a simulation of bitcoin's path, so why not just bitcoin enough ??
Any altcoin owns its name, project and ideas, so why that altcoins are related in the pricing with bitcoin ??
You see, it's more correct to say that it is bitcoin affect altcoins prices than opposite. All of them were created just in the chase of demand and greedy wish to make money on this and nothing more. Today the demand on everything about crypto is high, that means that we can expect the appearance of new and new coins and projects based on crypto and Blockchain.