Bitcoin has broken above US$80,000 for the first time in three months, riding a broader rally in alternative assets triggered by Washington’s efforts to tame US bond yields.The world’s largest cryptocurrency traded above US$80,900 on Tuesday, jumping roughly 25 per cent over the past week and signalling an early recovery from a prolonged market slump.While bitcoin remains nearly 36 per cent below its record high of US$126,000 set in October, the sharp rebound has prompted observers to predict...