Stablecoins Are a Monetary Revolution in the Making
0Marvin Barth says pegged cryptocurrencies could effectively create “narrow banking”: a long-held dream of economists looking to separate critical financial functions.
We may be on the verge of a revolution in monetary finance that is the century-long dream of many prominent economists. Financial innovation is laying the foundation for their dream just as the U.S. political economy is shifting to support it. This revolution, if it proceeds, has major implications for global finance, economic development, and geopolitics, and will create many winners and losers. The shift I’m referring to is “narrow banking” built on stablecoins. If those are unfamiliar concepts to you, let me review 800 years of financial innovation in 500 words.
Our current financial system is built on the concept of fractional-reserve banking. In the 13th and 14th century, Italian money changers cum bankers began to figure out that because depositors (rarely) demand their money back at the same time, they could hold only a fraction of the coin needed to back their deposits. Not only was this more profitable but it also facilitated payments across great distances: rather than send gold coins over dangerous roads, a Medici in Florence need only sent a letter to his agent in Venice instructing him to debit one account and credit another.
Though highly profitable and effective for payments in normal circumstances, fractional reserve banking has a downside. Its inherent leverage makes the system unstable. A downturn in the economy might cause more depositors to withdraw savings at once, or worse, generate rumors that the loans backing banks’ deposits are going to default, causing a “run” on the bank. A bank unable to meet its depositors’ demands collapses into bankruptcy. But more than just depositors’ wealth is lost when banks fail in a fractional reserve system. Because banks both generate credit and facilitate payment, economic activity is severely constricted when banks fail since payment for goods and services is impaired and lending isn’t available for new investment.
Over the centuries, as banks became simultaneously more leveraged and more critical to economic functioning, governments stepped in to try to reduce the risks of banking crises. In 1668, Sweden chartered the first central bank, the Riksbank, to lend to other banks experiencing runs. The Bank of England followed 26 years later. While that helped solve liquidity problems (banks with good assets but insufficient cash), it didn’t stop solvency crises (banks with bad loans). The U.S. created deposit insurance in 1933 to help stop solvency-based bank runs, but as illustrated by the many banking crises since, including the U.S. subprime mortgage crisis in 2008, neither deposit insurance nor bank capital regulations solved fractional reserve banking’s endemic fragility. Government intervention reduced only the frequency of crises and shifted their costs from depositors to taxpayers.
Around the time that the Roosevelt Administration was introducing deposit insurance, some of the era’s top names in economics at the University of Chicago were hatching a different solution: the so-called Chicago Plan, or “narrow banking.” During the U.S. savings and loan crisis of the 1980s and ‘90s the idea had a resurgence among economists.
Narrow banking solves the central problem of fractional reserve banking by separating the critical functions of payments and money...
https://www.coindesk.com/opinion/2025/06/23/stablecoins-are-a-monetary-revolution-in-the-making
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