Only place I know where you can get exposure to traditional markets with crypto is the exchange PrimeXBT.
Synthetix.io is working on a protocol to trade synthetic assets on Ethereum. There might be an opportunity here.
I believe it would be a gamechanger for Melon if there would be a way for funds to have exposure to:
1) Index like DJI, SPY, NDAQ, VIX
2) Commodities like Silver, Oil, Copper.
3) Stocks like Amazon, Apple, FB, Square,.. List is endless