"If a network can not be money attacked then it isn't decentralized."
No.
I was raised in a mixed society in which the Tlingit potlatch economy remained partially operant. There are other metrics than money. Society can exchange other valuable things than money to facilitate commerce, and can use blockchains to do so.
Thanks!
With this vote, I send you a Buick.
You have change coming.
Hopefully it's positive.