Coinbase's earnings report meeting has sparked a trend in keyword prediction markets, and Armstrong's single statement has made all the gamblers win.

Coinbase CEO Brian Armstrong suddenly had an idea at the end of the Q3 earnings call, repeatedly shouting key phrases like “Bitcoin, blockchain, and Web3,” unexpectedly leading those who bet Yes on Polymarket to victory. This incident not only made netizens jokingly call him a respectable prediction market player but also sparked a new round of discussions about market manipulation and trust mechanisms.

Prediction market stirs excitement: Armstrong's financial report meeting brings a surprise

At the end of the Coinbase Q3 earnings call, Armstrong suddenly said, “I was just tracking the prediction market to see what Coinbase would say next, so I want to add a few words: Bitcoin, Ethereum, blockchain, staking, Web3.”

The betting results of the above word on Polymarket are all settled as “YES”.

These keywords are exactly the topics on which players bet on the Kalshi and Polymarket platforms. Since Armstrong mentioned all the words at once, the results of these two markets were all settled as “YES”, allowing users who bet on “will be mentioned” to win.

(TACO trading profit secrets? Polymarket always bets “no” with a return rate of 12%)

The trading volume is only $80,000, with 24 players winning by chance.

Data shows that Kalshi's betting amount reached $80,242, while Polymarket was only about $3,912, with a total of 24 players participating. Fortunately, no one lost more than $12 in a single transaction.

Kalshi website

Crypto communities have expressed that “living in this era is truly crazy.” and thanked Armstrong for the windfall. However, some observers pointed out that such behavior indicates that the prediction market may be easily influenced by insiders, undermining its credibility as a tool for crowd-sourced predictions.

The CEO explained the “sudden inspiration,” but concerns about market manipulation remain.

Armstrong later responded on X, stating that it was just an impromptu reaction: “It just happened naturally when someone on our team dropped a link in the chat room.”

However, some in the community remain concerned that such actions may be interpreted as “information intervention,” akin to past insider trading or market manipulation cases. This is especially true since Polymarket had previously faced issues where the outcomes of bets could be manipulated by a few whales due to a design flaw in the third-party oracle protocol UMA.

(Polymarket prediction market sparks controversy! UMA protocol whale manipulates results: lose the bet but still make money)

From Jokes to Warnings: The Gray Area of Prediction Markets

This brief interlude, sparked by a single phrase, has become a hot topic in the crypto community. Some view it as a manifestation of humor and the free market, while others believe it highlights the lack of checks and balances on information power in the Web3 world.

Polymarket is regarded as the golden goose of Wall Street, with a valuation soaring to 15 billion dollars. At the same time, with the launch of tokens returning to the U.S. market, how to build user trust and make every effort to avoid market manipulation has become a key issue for the prediction market.

(Polymarket will launch its native token $POLY, and the airdrop plan will debut with the reopening of the US market)

This article discusses how Coinbase's earnings report meeting sparked a trend in prediction markets, with a statement from Armstrong allowing all gamblers to win, first appearing in Chain News ABMedia.