Google Research said a new estimate shows the quantum resources needed to break the cryptography used by many blockchains have dropped by about 20x, potentially bringing the risk closer than earlier projections. The team argued faster execution could enable "on-spend" attacks against Bitcoin transactions during the roughly 10-minute block window, and pointed to a 2029 goal for migrating to post-quantum cryptography.

On March 30, 2026, Senators Cynthia Lummis and Bill Cassidy filed the "Mined in America Act" to expand US-based Bitcoin mining hardware production and reduce reliance on China-linked equipment. The proposal would create a voluntary Commerce Department certification tied to access to existing federal energy programs and would codify a Treasury-run Strategic Bitcoin Reserve using seized assets, with no new taxpayer funding.

An analyst says Bitcoin may be nearing its final corrective phase after a bearish-flag breakdown, pointing to a historical signal on the three-day chart. The view centers on the 50- and 200-period SMA crossover, which previously coincided with major-cycle lows since 2014, as BTC trades around $67,000-$68,000 after a weekly close near $66,000.

Nakamoto Inc. (Nasdaq: NAKA) said it sold about 284 BTC for $20 million in March at a price below its average acquisition cost. The firm plans to deploy the proceeds into its core businesses and to restore working capital after recent mergers. In 2025, it reported $166.2 million in fair-value losses on crypto holdings and a net loss of $52.2 million.

Bitcoin's network hashrate fell nearly 6% after a US-Israel joint operation in Iran on February 28, with Iran estimated to represent 6–8% of global mining capacity. In March 2026, several major miners accelerated a pivot toward AI data centers, including MARA Holdings' sale of 15,133 BTC for about $1.1 billion and Core Scientific's $1 billion debt financing from JPMorgan and Morgan Stanley. Other firms moved the opposite way, with American Bitcoin disclosing holdings of 7,000 BTC after its September 2025 Nasdaq debut.

On Monday, Michael Saylor shared an AI-made ad promoting Strategy Inc.’s STRC preferred stock, which later passed 1.67 million views on X. The spot pitches early retirement via monthly dividends from STRC, described as an ~11.5% annualized payout, while also warning it is not FDIC-insured and is exposed to bitcoin volatility. Viewers largely mocked the video’s production and optics, with some traders calling it a late-cycle “top signal,” while a smaller group defended it as attention-grabbing marketing.

Bitcoin (BTC) bounced from the $65,000 area and reclaimed $67,000 and $67,500, with price trading above the 100-hour simple moving average. It is now consolidating below $68,500, where resistance also sits around $68,800, and a rejection could put $67,200 and $67,000 back in focus. Upside levels cited include $69,250, $69,500, and $70,000 if $68,800 is cleared.

On March 30, 2026, the Senate Banking Committee said Sen. Elizabeth Warren sent a March 26 letter to Commerce Secretary Howard Lutnick seeking clarity on oversight of Bitmain and its reported ties to Eric Trump's mining firm, American Bitcoin. The letter cites concerns about foreign influence, potential remote-access risks involving mining hardware used in the U.S., and a financing arrangement Warren described as unusually generous. Warren asked the department to provide records and answers by April 9, 2026.