Currencies have two functions: mean of payment and storing value. A currency like bitcoin can only be the second one in an effective way, that's what I think he

Currencies have two functions: mean of payment and storing value. A currency like bitcoin can only be the second one in an effective way, that's what I think he meant. And that's a big problem cause we really don't particularly need a better way to store value, but something that makes commerce more effective from a structural point of view not just a technological one.