It is intriguing for sure. It appears that Dai and BitUSD mainly rely on posting collateral but with SBD and NuBits the system is designed so that a user wouldn't necessarily have to be involved in STEEM or NuShares respectively. The NuShare prices could end up looking pretty juicy and I might throw a couple hundred into it and if everything survives it could possibly produce thousands of percent gains. But who knows..... I'm still trying to learn all the pieces of the puzzle on this one.