I don't understand why hedge funds have so little (none?) exposure to bitcoin. What are the principal obstacles?
Most funds are managed by old people, old people are too stupid to understand bitcoin, so they stick to the more traditional options, just look at guys like warren buffet. All of those guys got millionaire funds and they still own 0 BTC.
You could at least spell the man's name properly, and calling him a "M" illionaire is pretty hilarious too....
I guess if he was as smart as you, he could understand bitcoins

You should help these young ones, by providing the proper answer to their statements.

His name is Warren Edward Buffett and he is
currently worth 73.9 billion USD (2017) - Not bad for a stupid old man... right? He was ranked as the world's wealthiest person in 2008 and
as the second wealthiest in 2016. < He has done this, without the help of Bitcoin > I have read some books on the fella, and he is pretty
smart for a old
guy/billionaire 
OP, there are many Hedge funds out there as listed by some posters already, but the big one will be coming soon. { Winklevoss twins }
Watch this space.
http://www.coindesk.com/bitcoin-etf-anticipation-winklevoss-trust-deadline/