I understand the above arguments. It's just that I don't think the double-spend risk is that big of a problem for fiats.
The blockchain currencies have a technological advantage of transaction processing/recording. I think what's going to happen is that we will see a symbiosis of the traditional financial world and virtual currencies.
Amen. people dont get that the only advantage of a blockchain is that it is an immutable record. if you dont need an immutable record, essentially, a special type of the very common database, there is no need for a block chain. if you dont need consensus, just a record, then its actually a waste of time. for certain industries, a blockchain might improve operation (delivery, insurance, and obviously, payments) as these benefit from having community consensus.
for everything else, a block chain is just painting the lily, so to speak.
to get back on topic, fiat has solved the money issue elegantly for quite some time. i dont think the problem is with fiat, its with how we handle and distribute fiat, socially. we dont, and it doesnt seem to trickle down very well