Found Seth Klarman's take on Bitcoin interesting, this is from 2014:
Seth Klarman also weighed in on Bitcoin, noting that “Only in a bull market could an online ‘currency’ dubbed bitcoin surge 100-fold in one year, as it did in 2013. Now most sell-side firms are rushing to provide research on this latest fad,” he also noted that while “bitcoin funds” are being formed, the fund is “happy to let pass us by, the thinking behind cryptocurrencies may contain a kernel of rationality. If paper currencies – dollars and yen – can be printed in essentially unlimited volumes, and just as with all currencies are only worth what recipients on any given day will exchange in goods or services, then what makes them any better than the “crypto” kind of money?”
If his fund did take a position, he's doing a great job of obfuscating it.