Bitcoin cannot crash nor go down against the dollar. You can print as much US dollars or fiat currency as you want. BUT YOU CANT CREATE MORE THAN 21 MILLION BITCOINS. If everyone just realize that fact, it would never stop going up. It seems like the idiot stupid fools that are selling since December don't know that. It is just as simple as that.
In some point this statement is correct but what if the real satoshi will steal and remove bitcoin? We can say that this is a secured coin but we cannot neglect that this is a bubble thing. We don't know the source and maybe someday it will pop up like bubble.
However, I am not a haters of bitcoin. I am also a follower of it but I just to say that we need to anticipate everything that will happen. We don't need to stake what is happening from now. We should notice what are future could be.