This is a great measuring stick as far as Im concerned. Gold is about 7 trillion because investors like non inflationary investments but BTC is that and more.

Its hard to carry a mill in gold bars not so hard to carry a pen drive w a 100 BTC on it. :)

Bitcoin will eventually have a cap of 1.5 to 3 trillion itself, when the coin market cap is between 4 to 6 trillion.

And I wouldnt be surpirsed if crypto market cap was 3 trill next year.