Coinbase Index Fund
I have attempted to duplicate this index fund manually by purchasing the top 25 cryptocurrencies (market-cap weighted) over the past year or so. I'll say that it was hardly worth the enormous work involved, and these index funds cannot come soon enough to non-accredited investors. In some cases it's not possible to do perfectly alone: NEO has a minimum unit of 1 coin, and so if you wanted it to not be overweighted, you'd need to have a total portfolio that is an integer multiple of $6700 right now.However, I would not buy this fund from Coinbase since they are not a neutral player, and the market is not regulated yet. There are still great advantages in owning coins yourself - I expect that, as an average investor, I will certainly be prone to manipulation in some way. Alas, the greatest gains are probably long-since gone. No risk, no reward.