Cryptocurrency markets fell 4% to $2.76 trillion over the weekend as Houthi forces struck Riyadh and the US warned the conflict could escalate rapidly. According to BeInCrypto, Bitcoin traded near $80,354, Ethereum slipped to $2,586.72, while Solana and Zcash dropped more sharply as traders reduced risk. The State Department warned of flight cancellations, airspace closures and travel disruptions, and said Iran-backed groups may target US interests overseas.