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Bitcoin nears $80,000 threshold as Treasury buybacks fuel rally

Bitcoin extended a rally toward $80,000 after gains tied to U.S. regulatory moves, a White House crypto summit and plans to expand long-term Treasury buybacks. XRP posted sharp weekly gains and broke a long-term downtrend line, while officials at the summit said an era of enforcement-focused regulation had ended. Market warnings persisted amid heavy short liquidations. In South Korea, Upbit and Bithumb saw surging volumes led by XRP.