One of the first rules you learn in managing other peoples money is always hedge the downside. Or put another way, you need asymmetric upside/downside risk inorder to make any investment.
One of the biggest risks to bitcoin is the old saying that in down markets all products have a correlation of 1. Meaning when panic sets in, leveraged firms, which is almost all hedge funds, have to deleverage.
Unfortunately, in a large crash this means that everything gets sold pushing down prices more and causing another round of selling.
If the US cash equities markets does have a large crash this year, bitcoin is in the cross hairs as one asset that could have a selling spree that retail money has no hope of supporting.
EDIT
Ah this is his venture capital fund, so I guess the LP's are used to not being able to hedge and hence the naked speculation is appropriate....