(Bloomberg) -- A year ago the crypto market was on its knees and the notion that Bitcoin might retest a record high of nearly $69,000 was almost risible. Fast forward 12 months and some studies now point to just that possibility.Most Read from BloombergLargest Covid Vaccine Study Yet Finds Links to Health ConditionsTrump Keeps NY Empire Intact as Judge Rescinds Asset-Sale OrderWall Street’s Moelis Bet Big on the Middle East. Now He’s Cashing InRecord US Stock Rally Is Under Threat From a World i