There's a lot of chatter about the true value of bitcoin, and almost all of it is negative. So is that the legitimate financial community continuing to misunderstand (and undervalue) bitcoin, or is it entirely fair and likely accurate prognostication?
FWIW, here are four ways to short bitcoin. They're not that easily done, but they're out there:
https://www.benzinga.com/general/education/17/09/10070341/want-to-short-bitcoin-here-are-a-few-ways