Sen. Elizabeth Warren sent a March 15 letter to Defense Secretary Pete Hegseth seeking details on reports that the DoD may allow xAI's Grok to interact with classified systems. She cited alleged unsafe outputs, prior reports of private Grok chats appearing in search results, and concerns about vulnerabilities such as data poisoning, while noting uncertainty around the security and data-handling controls reviewed before any access is granted.

Grayscale has submitted an S-1 registration statement for a Hyperliquid (HYPE) ETF intended to list on Nasdaq under the ticker GHYP. The filing comes as HYPE moves into the crypto top 10 with a $10.1B market cap, while the token was quoted at $39.62 with an 8% weekly gain at the time of writing.

Bitcoin saw another failed upside attempt over the past week, meeting strong resistance at $75,000 before sliding back toward $70,000. Glassnode said options traders are leaning more defensive, with greater demand for downside protection alongside lower volatility expectations. Bitcoin was last noted at $70,668, up 0.33% on the day, while daily volume fell 17.30% to $36.67 billion.

Solana's tokenized real-world asset market has reached $1.82 billion, but SOL showed little movement. As of March 21, 2026 (09:02 UTC), SOL was priced at $89.96 (–0.04% weekly). The report also points to resistance near $95–$100 as a key level that could influence the next move.

Ethereum’s network activity accelerated in mid-March as active addresses climbed 121% over a few days, alongside a price rebound that briefly pushed ETH near $2,400. Active addresses rose from 381,202 on March 15, 2026, to 841,404 by March 19, while ETH later traded at $2,157, up 0.91% over the last 24 hours.

As of March 21, XRP was trading near $1.44, down 0.76% over 24 hours but up 3.15% on the week, with a market cap around $88.3 billion and 24-hour volume near $1.58 billion. On-chain and positioning data diverge: transaction activity has risen toward nearly 3 million per day while whale wallets decline, and derivatives show long exposure that could amplify moves if key support fails.

On March 19, 2026, TRON introduced the TRX/USDC trading pair on Aerodrome Finance, a leading DEX on Coinbase's Base layer-2 network. As of March 21, 2026 (08:00 UTC), TRX traded at $0.3096 with a market cap around $29 billion, while technical indicators on weekly charts suggested early momentum improvement. The article highlights key levels near $0.32 (USD pair) and 0.00000469 (BTC pair) as areas traders are watching.

On March 21, 2026, Bitcoin hovered around the $70K level after a late-February selloff tied to U.S.-Iran tensions and a subsequent rebound of more than 10% from the lows. March ETF activity stayed volatile, with a -$349 million combined outflow reported for March 6, while select inflow days favored BlackRock's IBIT. Technically, BTC retook the 50-day SMA as RSI and MACD shifted toward a more constructive setup, while $65K was highlighted by a trader as a key downside marker.