Karsten Wenzlaff, Advisor
August 26th, 2025
Karsten Wenzlaff is a Crowdfunding and Fintech Expert from Germany. He is Secretary-General of Digit[...]
MetaMask Adds Polymarket to Its Self Custody Wallet
Crypto | December 9, 2025
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Prediction Markets Inside Mainstream Self-custody Wallet
On December 4 2025, MetaMask expanded its self custody wallet by adding Polymarket prediction access to over 30 million monthly active users, enabling instant reach and impact across a vast user base. MetaMask wants to serve as a financial gateway where users form views on news and markets while maintaining full control of their digital assets.
The company already expanded into derivatives through a partnership with Hyperliquid in early October, and aims to centralize trading, rewards and identity inside its self-custody interface. The company also confirmed plans to launch a token that will connect activity across features.
What Polymarket Adds To MetaMask
Polymarket brings user growth, event liquidity and cultural relevance into MetaMask.
Coincentral reported that Polymarket's October 2025 trading volume was $3.02 billion with 477,850 monthly active traders, and 38,270 Polymarket event markets were created the same month (quickly growing demand for detailed, news-driven event prediction markets.
This growth is paired with scrutiny. A Columbia University study found that about 25% of Polymarket’s historical trading volume may involve wash trading, with peak periods where nearly 60% of weekly trades in December 2024 showed characteristics of wash activity and clusters of about 43,000 wallets linked to suspected wash networks.
See: TradingView and MetaTrader4: Recipe for Success?
Polymarket’s growing institutional interest must be recognized. Intercontinental Exchange announced that it would invest up to $2 billion in Polymarket at an $8 billion valuation and distribute its data through the ICE ecosystem. This deal places prediction markets inside the realms of one of the most established global financial groups, and likely why MetMask chose Polymarket.
Regulatory Fault Lines Around Prediction Markets
Prediction markets still remain one of the more fragmented regulatory categories in global finance. Polymarket’s regulatory pathway in the United States shows how quickly oversight can move from pressure to approval. In 2022, the Commodity Futures Trading Commission (CFTC) fined Polymarket $1.4 million for operating without proper registration and required it to block US users.
In November 2024, NCFA reported that federal agents searched the New York home of Polymarket chief executive Shayne Coplan and seized his phone and other devices after an election prediction market drew national attention. The company described the event as politically motivated, though no public evidence confirmed that claim.
In mid-2025, Polymarket acquired QCEX for $112 million, a CFTC regulated and licensed derivatives exchange, seeking approval to relaunch in the US. Soon after the deal closed, the CFTC issued a no action letter that relaxed several reporting and recordkeeping requirements tied to event contracts. Together, these steps cleared the way for Polymarket to return to the US market for the first time in three years.
Ontario regulators ruled that Polymarket’s earlier model offered short-maturity binary options to Ontario users in breach of the province’s ban, outlined in the OSC’s settlement with Polymarket, and formalized through the tribunal’s decision approving the enforcement agreement.
Across Europe, the sector sees similar barriers. Belgium added Polymarket to its blacklist as an illegal gambling service. Romania blocked access to Polymarket over election betting after a surge in election markets. Poland placed Polymarket.com on its register of illegal gambling domains.
For MetaMask, it means that access to its prediction markets is still limited in some regions.
Outlook
Instead of sending users to third-party apps, MetaMask is funnelling activity inward and rewarding it, as a competitive advantage. Certainly interesting to see a self-custody platform evolve to become a wider financial interface. Investors should watch the competitive race between Kalshi and Polymarket. A rivalry that will influence pricing efficiency, liquidity and retail adoption, especially as MetaMask becomes a distribution channel.
See: NHL Bets on Fintech’s Future with Kalshi and Polymarket
The Columbia study and the OSC decisions show increasing scrutiny. As these markets move inside mainstream wallets, regulators may demand new disclosures, limits and reporting standards. Policymakers will need to address how prediction markets intersect gambling laws, derivatives rules and securities oversight.
The National Crowdfunding & Fintech Association (NCFA Canada) is a financial innovation ecosystem that provides education, market intelligence, industry stewardship, networking and funding opportunities and services to thousands of community members and works closely with industry, government, partners and affiliates to create a vibrant and innovative fintech and funding industry in Canada. Decentralized and distributed, NCFA is engaged with global stakeholders and helps incubate projects and investment in fintech, alternative finance, crowdfunding, peer-to-peer finance, payments, digital assets and tokens, artificial intelligence, blockchain, cryptocurrency, regtech, and insurtech sectors. Join Canada's Fintech & Funding Community today FREE! Or become a contributing member and get perks. For more information, please visit: www.ncfacanada.org
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