The article shows how stablecoins and public blockchains cut the unit cost of payments and compliance, driving more global adoption instead of displacing existing systems. It argues that shared ledgers collapse reconciliation and regulatory burdens, unlocking new markets and users much like cheaper steam engines boosted coal demand.

• Stablecoins/public blockchains replace costly per-jurisdiction rails with one shared ledger, letting tiny firms like Sling Money (23 employees) reach 70 countries and Stripe expand to 101 nations after buying Bridge and Privy.
• Shared ledgers eliminate reconciliation costs that currently consume $61B/year and 42% of bank C-suite time, with platforms like JPMorgan's Kinexys already settling $2B daily in seconds.
• Like M-Pesa (27%→85% financial inclusion) and UPI (18M→228B transactions in a decade), driving unit costs near zero unlocks massive demand rather than just shifting existing volume.
• As GENIUS Act and MiCA clarify rules, the 1.3 billion unbanked adults become a real market opportunity for both new entrants and incumbents.

This article discusses how stablecoins are becoming mainstream for online and international payments, drawing parallels to the impact of WhatsApp on messaging costs. It explores the potential for stablecoins to transform financial transactions and reinforce the dollar's dominance in the global economy.

• Stablecoins moved $12 trillion last year, approaching Visa's $17 trillion but at much lower cost — like WhatsApp did to messaging, they're on track to make money transfer nearly free and invisible.
• Real companies are already using them for practical reasons: Stripe/Fidelity cut payment fees, SpaceX routes around broken banking systems in Argentina and Nigeria.
• New US laws (Genius Act, proposed Clarity Act) are giving stablecoins regulatory legitimacy needed for mainstream adoption.
• Circle and Tether already hold ~$140 billion in US government debt (top-20 holder territory), and could become the largest holders of US debt by 2030 — meaning stablecoins are quietly cementing dollar dominance globally.