Cool statistic, but meh. Comparing the marketcap of a digital asset to a business simply just doesn't make that much sense. Call me when bitcoin reaches gold's marketcap. 
Slowly it can make it. First take over Buffett and make him change his mind. He invested in gold and nothing in Bitcoin, maybe he will understand one day.
But I think you are right, gold is the real target, and comparing Bitcoin with companies is just for the news headlines.
$10 trillion USD market cap could happen with increasing adoption. Price will have to grow to $400,000 and it will not happen in the next two years but perhaps in ten it can be achieved.