By Bret Kenwell Coinbase shares have doubled since asset manager Cathie Wood’s Ark sold it. What does it look like on the chart now? Coinbase (COIN) – Get Coinbase Global Inc Report stock exploded on Thursday as the crypto specialist reported it would partner with the gigantic asset manager BlackRock (BLK) – Get BlackRock Inc. Report. The shares leaped 44% in early trading and have since settled back, up about 10% and approaching $89. That follows yesterday’s gain of 20% and Tuesday’s rally of 7.2%. With gains like that, it’s got to have Cathie Wood & Co. feeling a bit glum. Wood’s Ark Invest …