Nobody on wall street would be interested in this, other than maybe people who work in the mail room.

This index fund is more or less the equivalent of an ETF (Exchange Traded Fund) in the stock world, which is basically a package of stocks for those who want to invest without having to do research or learn how to perform trades themselves. In the stock world there are ETF's for foreign currencies, specific sectors like tech or healthcare, commodities like gold and oil, etc. This will be the first "crypto-ETF" if you want to call it that.

It's insanely primitive in the sense that it will only have 4 coins for now. Also, if you're an uninformed, non-tech savvy person who was interested in crypto, you could have easily gone onto CB and purchased BTC with fiat and called it a day.

This is a cool feature for CB, but not something that will attract a meaningful number of new buyers in my opinion.