Analysts said the move by Tesla was liable to prove a game changer for the currency.  "I think we will see an acceleration of companies looking to allocate to Bitcoin now that Tesla has made the first move," said Eric Turner, vice president of market intelligence at cryptocurrency research and data firm Messari.  "One of the largest companies in the world now owns Bitcoin and by extension, every investor that owns Tesla (or even just an S&P 500 fund) has exposure to it as well."