On May 29, 2026, Shielded Labs security researcher Taylor Hornby identified a critical flaw in Zcash’s Orchard shielded pool, one day after Anthropic released Opus 4.8. The issue could have enabled undetectable inflation of ZEC by repeatedly spending the same note while generating different nullifiers. The disclosure was followed by an emergency response and a reported market reaction in which ZEC fell about 60%, wiping more than $4 billion in market cap.

Dogecoin slid below $0.08 on Friday for the first time since February 2025 before edging back to about $0.084 at press time, leaving it roughly 89% under its May 2021 peak. Over the past week, whales accumulated more than 200 million DOGE and total whale holdings climbed to 18.84 billion coins. Spot DOGE ETFs have seen limited demand, with only one inflow day since May 19 and $12.44 million raised since launching in late November 2025.

Billionaire investor Tim Draper says quantum computing poses a more immediate risk to traditional banks than to Bitcoin, arguing blockchain networks can recover by reverting to the last uncompromised block. The debate intensified as Moody’s and industry groups flagged post-quantum migration timelines, while Bitcoin was cited trading at $61,383 after nearly a 9% drop over the last 7 days.

Santiment said Tuesday that many retail traders have effectively given up on Ethereum, a setup it argues can increase the odds of a rebound when pessimism becomes widespread. It added that ETH social sentiment has slid into an "extreme fear zone" after months of lagging Bitcoin and other altcoins. ETH also hit an intraday low of $1,620 twice in the past 24 hours, while Glassnode reported only 11% of ETH supply is held at more than 3x profit.

XRP perpetual contracts have started trading on Kalshi for U.S.-based users, introducing the platform's "American Perpetuals." The rollout follows CFTC clearance for Kalshi's first truly perpetual Bitcoin futures in the U.S. and a June 1 filing to self-certify derivatives tied to 12 major altcoins. Kalshi said its crypto perpetuals drew $100 million in trading volume within 24 hours.

On June 8, Coinbase Derivatives introduced HYPE and BNB futures, giving Hyperliquid's native token regulated futures trading access for the first time. BHYP saw a $2.9 million outflow on June 5 after earlier inflows of $22.1 million (May 29) and $19 million (May 26), bringing cumulative inflows to $91.2 million, while another $1.8 million later returned the fund to net inflows. Separately, Bitwise transferred 50,480 HYPE (about $3.28 million) to FalconX while still holding 1.55 million HYPE valued near $99 million.

Capriole Investments founder Charles Edwards says Bitcoin has moved back to its "Production Cost" level, a mining-based metric he cites as a key long-term valuation area. The indicator is currently around $62,650, close to BTC's spot price near $62,400, while network hashrate has recently slipped to about 837 EH/s after frequently touching 1,000 EH/s in May.

Cardano's ADA printed a multi-year low of $0.1485 on June 6, 2026 and was trading around $0.162 at the time of writing. Charles Hoskinson said crypto markets reflect an "existential crisis" and argued cutting trust intermediaries could unlock $120–$160B annually, while on-chain metrics showed dormant ADA beginning to move over the past 4–5 days. A potential spot ADA ETF decision window is cited from August 9, 2026, though no approvals have been confirmed.