A Google Quantum AI white paper dated March 30–31, 2026 argues that attacking Bitcoin-style elliptic curve cryptography could require far fewer quantum resources, sharpening focus on a 2029 migration target. The paper discusses scenarios including ~nine-minute key recovery from a broadcast transaction, a modeled 41% chance of pre-confirmation hijack, and estimates that about 6.9 million BTC (around 32% of supply) may be exposed when public keys are already revealed.

Bitcoin (BTC) moved into the Rainbow Chart's "Fire Sale!" zone by March 31, marking its first return to that band since the late-2022 FTX-driven capitulation. At the time of reporting, BTC was around $67,023, with the drop attributed to institutional selling and a pause in Strategy Inc.'s weekly purchase announcements. Some analysts see a higher chance a cycle floor is forming, while a 50/200-day SMA death cross on the 3-day chart is cited as a downside risk.

U.S. Senators Bill Cassidy and Cynthia Lummis introduced the “Mined in America Act” to expand domestic Bitcoin mining and increase U.S.-made mining hardware. The proposal would add a voluntary certification program, limit equipment linked to foreign adversaries, and place a Strategic Bitcoin Reserve under Treasury policy. The U.S. currently accounts for about 38% of global mining power while roughly 97% of mining hardware comes from China.

CryptoQuant's realized price model points to the $54,000 area as a level where Bitcoin becomes statistically cheap versus the market's average on-chain cost basis. BTC is trading in the mid-$60,000 range and remains roughly $10,000 above that baseline, suggesting capitulation may still be early. The analysis argues accumulation typically strengthens once price compresses into or below realized price for long enough to flush remaining optimism.

On March 31, 2026, the U.S. Department of Labor proposed revising its approach to digital assets in 401(k) retirement plans, reversing the 2022 guidance that urged fiduciaries to use "extreme care." The proposal removes any categorical ban and introduces a six-part safe-harbor checklist covering performance, fees, liquidity, valuation, benchmarking, and fiduciary understanding. Separately, on March 30, Senators Cynthia Lummis and Bill Cassidy introduced the "Mined in America Act" tied to domestic mining equipment and a Strategic Bitcoin Reserve.

Bhutan's government shifted about 375 BTC (roughly $25.18 million) on March 31, 2026, lifting the past seven days' total outflows to 1,018 BTC. The activity was routed via Druk Holding & Investments, while Bhutan's remaining holdings were estimated at about 3,954 BTC (around $263 million) after a steep decline from a late-2024 peak above 13,000 BTC.

Bitcoin changed hands at $66,597 at 8:30 a.m. Eastern on Tuesday, March 31, 2026, alongside a $1.33 trillion market cap and $48.8 billion in 24-hour volume. The price stayed inside a $66,037–$68,130 intraday band, with technical signals leaning neutral-to-bearish as it remained below key moving averages.

Bitcoin security researcher Justin Drake said on March 31 that two new quantum-computing papers increased his estimate of a "Q-day" to a 10% chance by 2032, a point when widely used cryptography could be broken. He argued the work reduces the resources needed for attacks based on Shor's algorithm and could, in best cases, shrink key-cracking time to minutes, though the threat remains theoretical for now.