I suggest those interested in Crypto Index Traded Funds to look into Crypto20. This fund provides a way to track the performance of the crypto markets as a whole by holding a single crypto asset.

"Crypto20 is a tokenized, closed-end index fund (CEF) which passively tracks the top twenty cryptocurrency assets by market capitalisation. All profits are reinvested into the fund."

Here is the link to the whitepaper for those interested: https://static.crypto20.com/pdf/c20-whitepaper.pdf