Guys, please check my article, in which I provide reserch and calculations of potential value of cryptocurrency market:
http://www.crypto-reporter.com/news/cryptocurrency-market-capitalization-can-top-4-trillion-usd-1440/

$4 trillion is according to conservative approach, it could be much more

I've used info about global money supply and about value of IT&Financial industries for calculations

Provide your oupinion, share your thoughts, please