Well, then several Ripple assets could also be added... As far as I get it, BitShares assets are just reflecting things outsides of BitShares in price, so while they might be capped, they in the end only depend on BitSharesX market caps and are nothing that exists on its own.
BitAssets are collateralized by Bitshares X, but the value depend on things "out of Bitshares X price" and not the market cap of Bitshares X.
So you have a BitUSD, it will be worth the equivalent USD in BTSX. If BTSX goes up or down, then 1 BitUSD will still be worth $1 of BTSX. So in that regard the value is not dependent on the market cap of Bitshares X, except when measuring it terms of BTSX. That is true for EVERYTHING though. Anything bought/sold in BTSX would have its value dependent on marketcap of BTSX.
The problem is that while the experiment is a grand one, it would not be fair to list these assets that are collateralized in BTSX on the front page. It would be double-dipping for lack of a better term.
On the other hand, it would be of interest to users of coinmarketcap to know this information.
Frankly I don't even think Ripple should be listed period. Somehow they just randomly change the # of coins and their marketcap goes up because of it ? How does that even work ? Would that work with other coins? I understand doubling/whatever the money supply, I just don't understand how that tripled the value of Ripple.