I've been fascinated by PoWH since the first doomed contracts came out. I still contest that it is the most interesting use of smart contracts so far.
"Every trade, buy or sell, has a 10% flat transaction fee applied. Instead of this going to the exchange, the fee is split between all currently held tokens!"
"10% of all volume this crypto ever experiences, is set aside for you the holders, as ethereum rewards that you can instantly withdraw whenever you'd like."
Quite the ingenious little scheme. There's an intrinsic virality component that I think could play out into some massive gains over a long time-frame.