Winklevosses' Gemini to introduce cryptocurrency block trading on April 12, which will allow for big sales off the exchange to avoid upsetting markets
Context & Ripple Effects
Block trading extends the institutional playbook Gemini has run since its launch under New York regulator approval in 2015: rather than chasing retail volume, the Winklevoss twins keep adding features that make a regulated US exchange usable by large players. Weeks later they extended the same approval-driven approach to new assets, winning regulator sign-off to list Zcash and later Litecoin and Bitcoin Cash (Zcash listing approval).
The move matters because size is crypto's structural problem: a big market sell on an order book moves the price against the seller. Off-exchange block execution lets whales and funds transact at scale while keeping the printed market clean — a prerequisite for the institutional legitimacy the exchange has pursued all along.
First-order effects
- Large holders gain a way to execute big bitcoin sales on April 12 without slippage from their own orders hitting the book, keeping Gemini's displayed prices stable during large trades.
Second-order effects
- Institutions that stayed on the sidelines because public order books couldn't absorb size get an execution venue that pairs OTC-style discretion with a regulated exchange's settlement, pressuring rival exchanges to match block capabilities or cede large-ticket flow.
Third-order effects
- If the pattern holds — regulator-approved feature, then regulator-approved asset, as with the Zcash listing — Gemini's moat becomes its compliance pipeline, and US crypto market structure splits between regulated venues courting institutions and offshore venues competing on breadth alone.
The trend: Regulated US crypto exchanges are competing for institutional flow by replicating traditional-market execution tools, with each NY regulator approval widening the gap over unregulated rivals.