Whether or not something is issued by a state has nothing to do with it being currency. I would challenge you to find a reputable source that says otherwise.
Pedantry aside, however, I agree with you that these ‘tokens’ are cryptoassets, entities whose only saving grace is their deliberately manufactured scarcity.
That's all block chains are, really: methods of manufacturing scarcity on a distributed, open medium.
First paragraph is all about the nation state. Currency is the state. Why would they give that up?
> In economics, a local currency is a currency not backed by a national government, and intended to trade only in a small area.
It's not a currency.