Brian Armstrong, the CEO of Coinbase, made waves during the final moments of Thursday’s third-quarter earnings call by listing various crypto buzzwords that users on Kalshi and Polymarket had bet would be mentioned, resulting in all markets resolving to “yes.”
A number of users from Kalshi and Polymarket were thrilled that their bets were successful right at the end. Conversely, others were understandably shaken by how easily a prediction market could be disrupted.
“I got a bit sidetracked tracking the predictions market regarding Coinbase’s comments in their upcoming earnings call, and I wanted to make sure to mention the words Bitcoin, Ethereum, blockchain, staking, and Web3 before the call concluded,” Armstrong stated.
The Kalshi and Polymarket markets about “What will Coinbase say during their next earnings call” saw $80,242 and $3,912 worth of bets placed.
This comprised 24 users on Polymarket, with none losing more than $12 on an individual bet.
On X, Armstrong remarked that it happened “spontaneously when someone on our team dropped a [prediction markets] link in the chat.”
lol this was fun – happened spontaneously when someone on our team dropped a link in the chat https://t.co/tQiV3B9jUj
— Brian Armstrong (@brian_armstrong) October 31, 2025
Armstrong seemed to delight more punters than not
Almost all users in the comments section expressed their satisfaction with Armstrong’s last-minute inclusion of the previously unmentioned crypto buzzwords.
“HAHAHAH THE GOAT BRIAN,” remarked Polymarket user TheMasterMind, while Kalshi users Redbullfool and Chungboy expressed their gratitude to Armstrong for the “gift.”
While prediction markets serve as effective tools for assessing expectations, they depend on the belief that insiders will not misuse their knowledge for personal benefit.
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Such actions have previously led to concerns about insider trading and market manipulation.
Coinbase performed impressively in Q3
Despite the unusual ending to the earnings call, Coinbase had another profitable quarter, reporting $432.6 million in net income and $1.9 billion in revenue, marking a 55% increase compared to the same quarter last year.
Coinbase also raised its Bitcoin (BTC) holdings by 2,772 BTC to 14,458 BTC — placing it back among the top 10 largest corporate holders of Bitcoin, according to BitcoinTreasuries.NET data.
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