Apples and oranges. Corporations make money and pay dividends, the other
is money. Look at the gold market cap for a better comparison (and a glance at the moon).
Correct any business is just a small player in terms of the economy no matter how big, bitcoin is money and as such a better comparison will be not only against gold, but against the dollar and the top 20 currencies of the world, that comparison will show you the true potential of bitcoin and be a useful tool to those that are holding hoping for a price increase.