Imagine if tomorrow occurs a crash like 2008. What do you think will happen to the price of Bitcoin and other cryptocurrencies?
You basically described it in the explanation itself. If there was a crash, then the price of Bitcoin would not be spared. However, I don't think a lot of the holders would be shaken. For most of them, they know that after every drop there will be a come back and after every large rise there will be corrections. For all of these cryptocurrencies, we can expect a similar behavior.