Adds context NEW YORK, July 20 (Reuters) - Bitcoin stumbled late on Wednesday after Tesla Inc TSLA.O said it converted about 75% of its purchases of the virtual token into fiat currency. Tesla sold $936 million worth of bitcoin in the second quarter, more than a year after it made a $1.5 billion investment during the peak of crypto currency's massive growth and popularity. Bitcoin has been in recovery mode so far this week in line with the stock market rally, as investors appear optimistic about the U.S. Federal Reserve's ability to rein in decades-high inflation.