Do all transactions even need to be crypto?

[Paranuatu]

There is talk how cryptocurrencies or bitcoin can replace world currencies.
But what is the value of cryptocurrencies, meaning a decentralized currency, in day to day transactions, such us buying bread or toothpaste.
Even if one thinks aside the insane transactions fees that make such uses unplausible right now, does a simple transaction such a buying a bread really need to be independently confirmed by miners etc. It takes so much energy, money to securely and uncentralizedly confirm a loaf of bread.
I feel most of the worlds transactions dont need to be crypto.

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[ebliever]

Not all cryptocurrencies require energy-intensive Proof of Work (POW). Proof of Stake (PoS) and other methods are used by many cryptocurrencies, and some cryptos like Byteball and IOTA have done away with the blockchain entirely.

One of the key advantages of cryptocurrency is the reduced risk of currency manipulation through altering the money supply of the currency. In the long run people may well become more comfortable with cryptocurrencies than using government "backed" currencies that are constantly being diluted via inflation to become less valuable over time. The ability of a government fiat currency to be manipulated by a central bank is more of a liability than an advantage in the eyes of anyone but the elites.

[Chrystora123]

actually not towards to Crypto, but more towards to Blockchain,
because in Blockchain all transactions recorded in Blockchain ledger so anyone can see,
while the transactions we have done so far who can see only the same 3 parties,.