出典:Wiktionary
cryptofiat (複数形 cryptofiats)
Cryptofiat or cryptofiat currency, is a noun and refers to a government issued cryptocurrency, backed by the central bank of said government.
Sources:
https://cointelegraph.com/news/dubai-will-issue-first-ever-state-cryptocurrency
https://steemit.com/cryptocurrency/@drdmd/the-future-storage-of-value-btc-diamond-dmd-coins-vs-cash-cryptofiats-and-gold
http://blog.coinomat.com/cryptofiat-the-future-of-money/