First published in October 2023, this article looks at how payment methods have changed and the possibilities emerging at that time.
The way we pay keeps changing. Cash, cards, bank transfers and mobile apps now sit alongside one another, each serving different needs. Looking at that history helps explain the interest in UPI, the digital rupee and artificial intelligence. A completely cashless future, however, is a possibility rather than a certainty.
From barter to coins
Barter allows people to exchange goods directly, but it depends on finding someone who wants what they have and offers what they need. Coins made trade easier by providing a commonly accepted means of payment. Carrying large quantities of metal money over long distances, however, remained inconvenient.
Why paper money mattered
Paper money developed in China and offered a lighter alternative to carrying coins. Over time, different countries developed their own banknote systems. Some currencies were once linked to precious metals, but that is different from the way modern fiat currencies derive their value. The development of paper money and the history of the gold standard should not be treated as a single event.
From cash to electronic payments
Today, notes and coins coexist with money held in bank accounts. Cards and electronic transfers make it possible to move funds without handing over cash. A digital payment does not necessarily involve a separate digital currency: paying from a bank account and using a central bank digital currency are distinct arrangements. The mix of payment methods also varies considerably across countries and communities.
UPI and everyday payments in India
In India, wider smartphone use, payment infrastructure and convenient person-to-person transfers have helped mobile payments become part of everyday life. The ease of paying a nearby shop or splitting a bill has been especially important to that change.
The Unified Payments Interface (UPI) enables payments between supported accounts through compatible apps. Its usefulness comes from making a bank-account transfer feel simple at the point of payment. Access, connectivity, security and digital confidence still affect who can use these services comfortably.
The digital rupee and cryptoassets
The digital rupee, or e₹, is currency issued digitally by the Reserve Bank of India. RBI began its retail pilot on 1 December 2022. It is distinct from UPI, which is a payment mechanism. Interoperability with UPI merchant QR codes was an important development in 2023, allowing participating digital-rupee wallets to work with existing acceptance infrastructure.
Blockchain-based assets such as Bitcoin and Ethereum represent a different development from an RBI-issued digital rupee. Their design and risks differ; even cryptoassets described as stablecoins should not be treated as equivalent to sovereign currency. NFTs attracted attention in entertainment and sport too. Cristiano Ronaldo’s “ForeverCR7: The GOAT” collection with Binance was one example in 2023. Collectible ownership and promotional benefits are separate from an everyday payment system.
How AI could support payments
Artificial intelligence may help payment providers identify unusual patterns, prioritise suspicious transactions and improve customer support. Systems can compare activity with past behaviour and alert a customer or bank when something looks unusual. They can also make mistakes: an alert is not proof of fraud, and AI cannot eliminate financial crime.
Voice assistants and other interfaces may make some transactions easier, but convenience must work alongside clear consent and reliable authentication. The most useful future payment systems will balance speed with accessibility, trust and control over our money.
For the distinction between e₹ and UPI, see RBI’s digital-rupee FAQ. The September 2023 NPCI circular documents QR interoperability.