行情播報：2026年02月21日加密貨幣跌幅前5幣種一覽，跌幅最大為 Aave

Aster推出隐私Layer1主网，交易量下滑76%背景下ASTER价格反弹

去中心化衍生品平台Aster於3月18日上線其專為永續合約設計的高性能隱私區塊鏈Aster Chain，支持跨鏈資產充值，強調帳戶級隱私保護。儘管主網發佈推動ASTER價格短暫上漲，但交易量和總鎖定價值大幅下降。未來能否吸引流動性將是其增長關鍵。

XRP 今日新聞：SEC 認定「商品」非證券，交易所訂單發出強勁買訊

3月18日，美國證券交易委員會（SEC）主席宣布XRP被歸類為「數位商品」，結束了監管不確定性。同日，Coinbase顯示XRP現貨訂單簿達到9:1的買賣比率，為最強買方信號。這一變化降低了持有者的合規風險，促進了機構信心，並為未來金融產品的申請鋪平道路。

Harry Howard AI 完成預測市場產品測試，將於近期推出代幣

Harry Howard AI recently completed testing of its prediction market product, attracting 8,518 participants and generating 26,423 transactions. The platform secured $3 million in seed funding in 2025, is currently advancing private fundraising efforts, and will launch a token.

Pi Network 啟動安全圈協議，傳富達、亞馬遜成生態認證成員

Pi Network 推出「安全圈啟動協議」，旨在增強網路的韌性與可信度，促進向 DeFi 和 Web3 的整合。新協議引入去中心化治理層，強化交易驗證與參與者身份驗證，並提供機構參與的框架。社群對知名機構加入的傳言持樂觀態度，但需謹慎對待，尚待官方確認。此技術升級被視為推動 Pi Coin 漸向成熟金融生態的重要一步。

昨日比特币现货 ETF 净流入 1.98 亿美元，贝莱德 IBIT 占比超八成

Gate News Alert: On March 18, according to Trader T's monitoring, Bitcoin spot ETFs recorded total net inflows of $198 million yesterday. Among them, BlackRock's IBIT had net inflows of $168 million, accounting for more than 80% of the day's total inflows; Fidelity's FBTC had net inflows of $24.39 million; VanEck's HODL had net inflows of $3.17 million; Ark's ARKB had net inflows of $2.48 million; all other ETFs had zero inflows for the day.

BTC盤中跌破7.4萬美元，RWA板塊領跌市場3.92%

March 18, Gate News reported that the crypto market overall retreated, with Bitcoin declining 1.92% to below $74,000 and Ethereum falling 1.30% to above $2,300. RWA, PayFi, and other sectors experienced widespread declines, but individual projects such as Siren and River rose against the trend.