Who else is there? add yours if you know anyone "famous" with a pessimistic prediction so we can monitor how they do.
The main point here is: Some of these guys will look like clowns in the long term because someone always makes an overly pessimistic prediction, which costs money to people that follow said prediction. It doesn't matter if the price goes lower than it is now, someone will get it wrong by a long shot.
Who will then be the next to join the unfortunate list?
As a matter of fact, it's easier to find famous positive predictions with btc going over $25k in 2018, than famous pessimists. W. Buffett is pretty negative about bitcoin, he keeps saying it's a useless thing, because it's not representing any real product in contrast with stock. I couldn't find any specific price predictions made by him, though. I also found this Nouriel Roubini economist guy who said back in February that btc will go down to zero. This guy is pretty serious, he has a Harvard Phd degree in Economy and there's an article on CNBC oh his 'noted economist's' views, and yet we all know how wrong he is probably going to be. I choose him as my famous pessimistic guy.