$ARB ARB spiked 17.1% after Robinhood’s June 29 X post teased a June 30 fireside chat with Ethereum’s Vitalik Buterin and Offchain Labs’ A.J. Warner. Traders interpreted this as confirmation of a blockchain partnership first reported by Bloomberg in May 2025. ARB rose from $0.31 to $0.386 intraday, though no official deal was confirmed

Gemini’s EU tokenized stock launch (June 29) via Arbitrum for MicroStrategy shares added real-world use case credibility

FDUSD stablecoin integration (May 2025) and Timeboost revenue ($443K in 4 weeks) highlighted Arbitrum’s DeFi infrastructure role

Will ARB sustain gains if the Robinhood announcement underwhelms?