A central bank is not a branch for the public
A commercial bank holds accounts for households and firms, accepts deposits and grants loans. A central bank sits one layer beneath it: it issues banknotes and maintains electronic reserve accounts for eligible banks. Banks use this money to settle payments with one another and to meet part of their liquidity needs. An ordinary person therefore normally has no personal card account at the ECB or at Národná banka Slovenska.
In the euro area, the ECB and the Eurosystem are not synonyms. The Eurosystem comprises the European Central Bank and the national central banks of countries that use the euro. The ECB's Governing Council makes monetary-policy decisions, while the system as a whole implements operations. Národná banka Slovenska is therefore not a separate issuer of a distinct Slovak euro.
Price stability is the primary objective
EU treaties make price stability the Eurosystem's primary objective. The ECB's strategy expresses this as a symmetric two-percent inflation target over the medium term. ‘Medium term’ matters: a central bank cannot set next month's prices precisely, and it need not react to a brief failed harvest in the same way as to persistent growth in wages, credit and demand.
Key policy rates are the best-known instrument. A central bank can also provide or drain liquidity, take collateral and, in exceptional conditions, purchase assets. These decisions first change conditions in financial markets and banks; only later do they pass into borrowing, saving, demand, employment and prices.
- policy rates influence the short-term price of central-bank money
- operations add or withdraw liquidity from the banking system
- communication changes expectations about future policy
- asset purchases are used especially when ordinary instruments are insufficient
Payments, banknotes, supervision and financial stability
A central bank's work does not end with inflation. The Eurosystem promotes the operation of payment systems, manages foreign reserves, conducts foreign-exchange operations and takes part in issuing euro banknotes. The ECB collects statistics required for decisions and has responsibilities in banking supervision and macroprudential policy. Exact powers are divided among the ECB, national authorities and other European institutions.
In a crisis, a central bank may provide liquidity to a solvent bank facing a temporary cash shortage. That is not an automatic rescue of every owner or creditor. Emergency liquidity comes with conditions and collateral, and it cannot repair a balance-sheet hole caused by assets being worth less than liabilities.
Central-bank power has limits — where the Bitcoin comparison begins
A central bank does not produce goods, set taxes or choose government spending, and it cannot permanently raise living standards merely by creating more currency units. It cannot precisely control retail lending rates, banks' willingness to lend or energy prices. It decides under uncertainty, with delayed data and side effects, so it must explain its actions and remain publicly accountable.
Bitcoin separates issuance of the base unit from a central-bank decision: its issuance schedule is part of rules checked by nodes. That constrains discretionary base-money creation, but supplies no monetary policy, lender of last resort or target for a stable consumer-price level. It is a different answer to who may change monetary rules, not a replacement for every central-bank function.