it is very possible to use blockchain technology for digital fiat transaction systems or banking, or anything that requires a ledger system for recording their transactions. because blockchain technology is not only developed for cryptocurrency systems, but more broadly than that, it can be used for transactions such as banking, cargo, etc.

but the question is whether this company or institution is ready to accept blockchain technology in their system? because to develop it means they need to develop their own system or collaborate with a third party, which means more costs or regulations that prohibit them from adopting blockchain technology in their system.