Since the Winklevoss ETF got rejected I don't think we will see any pension fund offering cryptocurrencies exposure anytime soon. I am not sure it is a good idea anyway, there are many disadvantages in letting a fund keep control of your cryptocurrencies.
I think its better to just buy into the ones that interest you yourself, with your after-tax money, keep your own private keys and don't look at the price/news too much.
You can take more risk if you want, and try and get an interest on your coins but the web is full of scammers.