I think peer-to-peer, it is still a valid technology.
But how it can operate without some sort of main exchanges is a question.
Maybe the developers can build some sort of bid/sell protocols into the software, and have the transactions mediated on the network.
There is a future for this kind of thing, but it is not for the storage of wealth. It will succeed when the primary use is for the transmission of wealth, like in credit card transactions.