@silverpill @cmdrmoto Yeah, true. Per definition a blockchain has nothing to do with a currency, it's just an append-only database following some kind of consensus.
I'm just thinking about the scalability implications of this very append-only system.
Scalability from a disk-space perspective. It just grows and grows without any way to really "stop" the size.
With time this will centralise to some few nodes that have the financial capacity to buy more and more disks.