So I watched the interview the CEO had on CNBC and I have some concerns with this structure. I originally thought it would be balanced the way a 60/40 equity/bond fund is where the goal is to keep the fund in the same ratio. If equities rally and get to 65% you sell stocks and buy bonds to re-balance.
This coinbase fund is doing the opposite. It's weighting the coins based on market cap. So as one coin does well and increases in market cap, the fund will adjust accordingly and buy more of that coin. In other words, it will chase prices and buy high and sell low. With markets as volatile as these coins are, that could be a recipe for disaster.
I would much rather see them hold these coins in balance so let's say litecoin rips and doubles in value. Rather then buy more litecoin, they should sell some to keep the balance even with the others. If BCH takes a 30% hit while the others are flat, I would rather them re-balance by buying BCH to bring it back in line with the others. This is similar to what a 60/40 equity/bond fund does.