Smartcoins are my favorite metric because i know they are all backed by BTS as collateral (as of today nearly 400% backed) and they are such a valuable resource in the crypto world.
Once we have more adoption on what in my opinion is the best form of stable value crypto currency on the market, more BTS will need to be locked up to support them which will lower circulating supply which should have positive effects on the price which then will unlock more collateral for creation of more smartcoins -> what a great positive feedback loop