I don't recognize any of the names in the above list except Peter Schiff, and I only know of him because he'd been telling people to buy precious metals back around 2011-12 right when they were peaking. Since then I've sort of lost respect for him because of that terrible advice, and the fact of the matter is that he was probably only telling people that in order to sell his own metals via pump & dump.
The fact is that nobody knows where the bottom is, or whether a recovery is just that or a dead-cat bounce. It all comes down to whether you have the balls to act on your beliefs. Me? I have the balls but not the money. I would have bought bitcoin at any point in the past 2 weeks because I think it's been beaten down too much--I just don't have the money, and not only that but I owe about $600 worth of bitcoin to someone, which is going to wipe out my sig campaign earnings for quite a while. It sucks, but whatever.