Traders Sue Polymarket Over Its Strategy Bitcoin Market

gm, Defiers!

These were the biggest news in web3 today:

• Polymarket sued over Strategy market resolution
• KAST's terms of service draw fire
• Tether invests $20M in Mercado Bitcoin
• BonkDAO's attacker moves loot
• CAP climbs to the #2 lending protocol by volume
• MGUSD, Explained: How MoneyGram Built a Stablecoin (Partner)

The week's biggest Strategy question — would Michael Saylor sell bitcoin — was a controversial market on Polymarket. Now two traders are suing over how that market was called. Two Polymarket users sued the platform and CEO Shayne Coplan in New York state court, alleging the site wrongly resolved a market on whether Strategy would sell Bitcoin. The complaint from William Wood and Thomas Bush lands the same week Strategy actually sold 3,588 BTC — turning a contested resolution into a live dispute over what "sell" meant and when it counted.

The suit puts the softest part of prediction markets on trial: resolution. Kalshi and Polymarket have raised at multibillion-dollar valuations on the promise that outcomes are objective, but someone still has to decide when a market pays. A courtroom fight over a single Strategy contract is really a fight over who that someone is — and whether traders can sue when they disagree.

Read more below!

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WATCH

Kaleo: 'If You're Bullish on Bitcoin, Buy Bitcoin' — Not MSTR

Today's Polymarket suit turns on whether Strategy would sell its bitcoin. Kaleo makes the case that owning MSTR and owning BTC were never the same bet — "don't buy something someone else can print" — and why the distinction matters more the more Saylor sells.

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REGULATION

Traders Sue Polymarket, CEO Coplan Over Strategy Market Decision

Two Polymarket users, William Wood and Thomas Bush, sued the platform and CEO Shayne Coplan in New York state court, alleging the site wrongly resolved a market on whether Strategy would sell Bitcoin. The complaint names Polymarket's holding entities and lands the same week the company actually sold 3,588 BTC, sharpening the dispute over what the contract's resolution should have been.

Market Data

Traders Sue Polymarket, CEO Coplan Over Strategy Market DecisionTwo Polymarket users sued the prediction-market platform and CEO Shayne Coplan in New York, alleging it wrongly resolved a market on whether Strategy would sell Bitcoin.thedefiant.io

Why this matters: Resolution is the soft spot in prediction markets. A courtroom fight over one Strategy contract tests whether "objective" outcomes hold up when traders can sue over the call.

CEFI

KAST's ToS Draw Fire After Public Feud With EtherFi CEO

A five-day exchange between ether.fi CEO Mike Silagadze and KAST CEO Raagulan Pathy escalated from a card-fee comparison into public scrutiny of how KAST treats customer deposits. The feud pulled KAST's terms of service into the open, with users parsing what rights the card issuer retains over their balances.

Why this matters: Crypto-card ToS rarely get read until a founder fight forces it. Where customer deposits sit — and who can touch them — is what every neobank card should answer plainly.

TRADFI AND FINTECH

Tether Invests $20M in Brazil's Mercado Bitcoin

Tether invested $20 million in Mercado Bitcoin, Brazil's largest crypto exchange, in a strategic growth round backing its push into tokenization, payments, credit, and capital markets across Latin America. The deal extends Tether's pattern of taking equity stakes in the rails that distribute its stablecoin.

Why this matters: Tether is spending its reserve profits buying distribution in emerging markets. Owning a slice of LatAm's biggest exchange entrenches USDT where dollar demand is structural.

HACKS

BonkDAO Attacker Moves $19M Loot Into New 'BONK 2.0' DAO

The wallet behind BonkDAO's $20 million governance attack parked most of the stolen BONK in a multisig controlled by a newly created shadow DAO branded "BONK 2.0," Chainalysis said. The attacker is using the trappings of a legitimate DAO to launder governance-seized funds in plain sight.

Why this matters: Dressing stolen funds as a new "DAO" is a fresh laundering wrinkle. It tests whether onchain tracing and exchange blacklists can move faster than a rebrand.

DEFI

CAP Token Climbs to #2 Lending-Borrowing Protocol by Volume, 10 Days After Launch

CAP, the stablecoin protocol's governance token, climbed to the #2 lending-borrowing protocol by volume just 10 days after its June 26 debut, with $862 million in cumulative trading volume. The fast ramp puts a brand-new token near the top of a category long dominated by Aave and Morpho.

Why this matters: Volume this fast on a 10-day-old token is as much incentive farming as organic demand. The test is whether CAP holds the ranking once the launch emissions taper.

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