There are many reasons... 1/ You don't see this as giving up your diamond but making it shine bigger and faster. You believe that your $3.9B valuation can grow

There are many reasons... 1/ You don't see this as giving up your diamond but making it shine bigger and faster. You believe that your $3.9B valuation can grow faster with the help of a larger partner perhaps this is best for you and your investors. 2/ You have been running a company for some time and you are tired of running it or want to get out and "cash out" your hard work. 3/ You don't believe you can maintain a $3.9B valuation under future market conditions or upcoming competition and so you are willing to take the premium now (better for you and investors) Just to name a few