With sound he means it's verifyable. All currency is accounted for

That sounds good until fraud/hacks/mistakes happen and your are the customer that needs them to modify the account.

Example: I got my bank routing/account numbers from a bank in a state in which I had not set up my checking account in but the bank teller put the routing number as if I had creating the account in that state. Thus, my first paycheck went to an empty account and I went to the bank that day and they fixed it for me.

Putting any of my money in a place that is irreversibly is the last place I would put it.

As long as you can trust your banks and your nation's government then that is fine. You probably live in a stable western country. Nice for you.