BTC is still the best choice, maturity and popularity wise.
When you think about it, the whose system can be "layered" as the main wallets (Core or 3rd-party) as 1st layer. Next would be the addresses in it. It will depend on how the majority will adopt to it.

High BTC with high value without any uses will crash if it stays like this. Just Supply and Demand in the pseudo-markets?
This is not Gold which you can craft, fueling the demand.
This is not Diamond that is scarce, even against low demand.
This is a "currency" people.

They should take the right action for the best result.