From my limited understanding of blockchain technology in general and ethereum in particular, whatever the token, or ether that this technology uses, eventually it has to be related to fiat money. Eg: a gas has to be paid for in ether, which can be purchased from fiat money such as USD.
So whatever the benefits of blockchain promises, such as displacing much of the sector’s infrastructure, cutting out middlemen, speeding transactions and reducing costs for things like securities and payments processing, the usefulness of blockchain technology is very much limited by the stability of the currency conversion; if the price is volatile, then blockchain can't be widely adopted because no one would want their investment to drop 50% overnight.
Am I right on this? If yes, why banking and logistic sectors are still implementing the blockchain technology right now when the price is violatile?