What if a shared sequencer fails and freezes several rollups at once?
A shared sequencer serving multiple rollups failing simultaneously freezes several L2 ecosystems and their bridged liquidity at once, so the correlated outage hits every dependent L2 token and drags ETH on beta. Rhymes with single-chain sequencer outages (Arbitrum/zkSync 2023-24), but the shared-sequencer twist turns an isolated halt into correlated systemic risk. Forward angle: shared sequencing is sold as an interop upgrade, yet it concentrates a single point of failure — the repricing should penalize the 'based/shared sequencing' thesis specifically, not just the chains that froze.
Every number ships with its receipt — the odds, the range, the precedents, and a public grade at Reality Check. The statistical machinery that produces it is proprietary.
The butterfly cascade
How this trigger trickles across markets, left → right — the root shock, its first‑order moves, then the ripple effects. Drag any node; tap a market for its real price history.
Resolution timeline — how this probability is moving
Our model's odds (electric blue) over time vs the market's (Polymarket, amber), from the past toward the 6–18 months horizon. Each dot is a real macro event that nudged the probability — green pushed it up, red pushed it down. Tap a dot for the source. Loading the probability audit trail…
What it would mean
If this plays out, it is a risk-off shock. A shared sequencer serving multiple rollups fails, simultaneously freezing several L2 ecosystems and their bridged liquidity. The trigger decomposes into signed root‑shocks — Crypto confidence ▼ · Risk appetite ▼ — which propagate through our causal graph to the markets below.