For the stock to double by 2032, the search giant would have to become a roughly $9.1 trillion company inside about six years. Put another way, the profit growth the doubling case needs has to clear a charge that gets bigger every year. If the valuation multiple holds, the stock doubles when earnings roughly double -- and doubling earnings by 2032 takes about 12% compounded annual growth. At about 22 times, earnings would need to grow closer to 17% a year for the stock to double on schedule. My own answer is that the doubling case is credible, but not automatic.