USDC

Polymarket

Update (March 27 at 8:32 pm in UTC): This article has been updated to include a statement from Coinbase CEO Brian Armstrong.
Coinbase is facing user backlash after sending notifications promoting event-contract bets during the March Madness basketball tournament.
In January, Coinbase <a href="https://cointelegraph.com/news/coinbase-prediction-markets-all-50-us-states-kalshi" rel="noopener noreferrer nofollow">rolled out prediction market bets</a> for US-based users as part of a partnership with Kalshi. Some users say the rollout has turned into an effort to get people “hooked on sports gambling” through an app they previously used for crypto trading.
“I have received three separate notifications about College Basketball from Coinbase in the past hour alone,” <a href="https://x.com/AvgJoesCrypto/status/2037344624704966979" rel="noopener noreferrer nofollow">said</a> X user AvgJoesCrypto on Thursday.
“It is absurd that, amidst arguably the worst collapse in trust in this industry’s history, the largest American CEX has completely pivoted to trying to get their customer base hooked on sports gambling, so that they can extract even more exorbitant fees,” he continued.
<figure><img alt="Coinbase, Cryptocurrency Exchange, Sport, Prediction Markets" src="https://s3.cointelegraph.com/uploads/2026-03/019d2fed-ef3a-7b33-b7eb-c6a8afdcc134.png">
 <figcaption>Source: <a href="https://x.com/GivnerAriel/status/2035829338105315695" rel="noopener noreferrer nofollow">Ariel Givner</a>
 </figcaption>
</figure>
Like sports event contract betting on platforms such as Kalshi and Polymarket, Coinbase Prediction Markets offers US-based users the chance to bet on the outcomes of a variety of events.
Prediction market platforms already face several lawsuits filed by state-level authorities, <a href="https://cointelegraph.com/news/cftc-innovation-task-force-crypto-framework" rel="noopener noreferrer nofollow">even as the federal regulator</a>, the US Commodity Futures Trading Commission (CFTC), pushes for “exclusive jurisdiction” over the market.
John Palmer, co-founder of PartyDAO, <a href="https://x.com/johnpalmer/status/2035782321551392971" rel="noopener noreferrer nofollow">expressed</a> a similar sentiment over the Coinbase notifications, pushing bets on March Madness games:
<blockquote>
 “This is essentially encouraging me to gamble. What does that say about the internal philosophy around money management? Can I trust the yield sources on USDC interest? Can I trust internal risk management, etc?”
</blockquote>
In December, before the launch of its prediction market service, Coinbase <a href="https://cointelegraph.com/news/coinbase-sues-states-prediction-markets" rel="noopener noreferrer nofollow">filed lawsuits against regulators</a> in Connecticut, Illinois and Michigan. The exchange argued, likely in anticipation of its prediction market launch, that the CFTC, not state-level gambling authorities, should regulate the platform.
In a Friday X post responding to complaints, Coinbase CEO Brian Armstrong <a href="https://x.com/brian_armstrong/status/2037565116326318575" rel="noopener noreferrer nofollow">attributed</a> the notifications to a “bug” and apologized to users:
<blockquote>
 “[W]e’ll need to find the right balance of not pushing things on people they don’t want, but making sure whatever they want is there. Clearly, we missed the mark in this case. We’ll take it as an opportunity to improve.”
</blockquote>
Related: <a href="https://cointelegraph.com/news/coinbase-launches-token-backed-down-payments-for-fannie-mae-loans" rel="noopener noreferrer nofollow">Coinbase launches token-backed down payments for Fannie Mae loans</a>
<h2 id="lawmakers-push-to-ban-politicians-from-prediction-markets">Lawmakers push to ban politicians from prediction markets</h2>
Amid user feedback and state-level lawsuits, many US lawmakers have also been calling for legislation to address issues in prediction markets.
Allegations of individuals in government and insiders close to the political apparatus using Polymarket to profit from a bet on the removal of Venezuelan President Nicolás Maduro have led to bills <a href="https://cointelegraph.com/news/lawmakers-introduce-bill-banning-congress-president-from-prediction-markets" rel="noopener noreferrer nofollow">seeking to ban</a> any US president or member of Congress from using the platforms.
Both Kalshi and Polymarket have introduced separate policies to curb insider trading. Kalshi <a href="https://cointelegraph.com/news/kalshi-joins-polymarket-user-bans-head-off-insider-trading" rel="noopener noreferrer nofollow">said it would ban political candidates</a> from trading on event contracts related to their campaigns, and Polymarket <a href="https://cointelegraph.com/news/polymarket-rules-update-manipulation-insider-trading" rel="noopener noreferrer nofollow">introduced measures to limit</a> easily manipulated or ethically sensitive markets.<iframe src="https://www.youtube.com/embed/Bg4yErvSHfE?start=" sandbox="allow-scripts allow-same-origin allow-popups allow-forms"></iframe>
Magazine: <a href="https://cointelegraph-magazine.com/dirty-secret-quantum-signatures-no-one-knows/" rel="noopener noreferrer nofollow">Nobody knows if quantum secure cryptography will even work</a>

Coinbase users push back against prediction markets notifications

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