It’s too early to determine whether this multi‑year prediction has come true.

1. The stated horizon (“next several years”) hasn’t elapsed.
The prediction was made on 19 July 2025 and explicitly framed as playing out over the next several years. Evaluating it by 30 November 2025—roughly four and a half months later—does not satisfy that timeframe, so the outcome cannot yet be judged.

2. Directionally, evidence supports growing stablecoin‑driven dollarization.
Recent analyses show rapid growth of dollar‑pegged stablecoins used as de facto digital dollars in high‑inflation or capital‑controlled economies such as Argentina, Turkey, Nigeria, and others. In these places, people use USDT/USDC for savings, payments, remittances, and invoicing, often explicitly to escape weak local currencies.(followin.io) Stablecoin transaction volumes globally have surged into the tens of trillions of dollars annually, and total stablecoin supply exceeds $200 billion, with usage heavily concentrated in emerging markets.(coindesk.com) This supports the trend sacks described: bottom‑up, dollar‑stablecoin usage in developing countries.

3. But current data do not yet show that a “large share” of all economic transactions has shifted.
Even optimistic reports emphasize that stablecoins, while important in certain niches (crypto trading, cross‑border payments, savings, some retail payments), still represent only a small fraction of total money supply and overall transaction volume in these economies. One analysis notes that despite fast growth, stablecoins are still only a few‑tenths of a percent of global money supply.(blog.wewire.com) Most day‑to‑day commerce in these countries still runs through cash and traditional banking systems, so the claim that a large share of all economic transactions has shifted to dollar stablecoins is not yet demonstrably true or false.

Because (a) the forecast’s multi‑year window has barely begun and (b) current evidence shows strong growth but not yet the clear, economy‑wide dominance implied by “a large portion of these economies,” the only defensible judgment at this point is inconclusive (too early).