This just strikes me as really shady - not because I have any reason to believe that you're not going to get what they're selling you, but that a lot of non-exp

This just strikes me as really shady - not because I have any reason to believe that you're not going to get what they're selling you, but that a lot of non-experts in financial products are familiar with the idea of an index fund as a (relatively) safe and responsible long-term investment, when this is clearly neither of those things. Coinbase even describe this as an investment in their description. This has more in common with buying a bunch of lottery tickets in a syndicate for a draw that might not even happen. I wish we'd be more responsible than to call buying cryptocurrency investing. We know what it is. It is not this.