I absolutely agree that the crypto currency market is a bubble and I also agree that it will continue after the bubble pops. For people with a lot of financial market experience such as Warren Buffet this is obvious. I do not think they are purposely talking negative about the market to drive prices down. I think they are simply being honest about what they see.
Much like the dot-com bubble in 1999, when this bubble pops there will be many people that lose a lot of money. But those who are ready for it and can put cash to work when the market bottoms out will make even more.