The current paper fiat money scheme does NOT have problems of keeping track of its ledgers, or making transactions.
So the whole fuss about cryptos having decentralized ledgers and making anonymous transactions(at much slower speed) is barking up the wrong tree! Some private banks probably keep clients data/money more securely than those crypto exchanges that got hacked!
The current paper fiat money scheme has the following one and only fundamental design flaw:
Paper fiat money is NOT backed by physical stuff(gold/silver) like it used to.
Thus, banks operate on fractional reserve, i.e. printing money out of thin air. The reserve requirement is what central banks use to control and coordinate money supply expansion. Since paper is just paper. So paper reserve is no reserve at all if taking the entire banking system as a whole.
So essentially banks operate on zero reserve. This is the reason that all banks require a license to operate, a license to print money.
Cryptos don't solve this fundamental flaw of paper fiat money in any way.
Wake up to this fact! You've been fooled again!