Such suggestion is raised once in a while, and a lot of people show interest in ETF traking smartcoins. The problem that hardly any ETF can outperform crypto. If you want to peg a smart coin to ETF, this should be some killer ETF, which at least outperforms USD, GOLD and SILVER.

I agree that no "legacy" equity or fixed income based ETF can outperform cryptos. But USD pegged smartcoins can't do it too and and BitUSD has a market cap of almost $27M. So we speak about price stability and low volatility. I think at this point it's interesting to have an ability to move some assets from 0-Risk & 0-Performance zone to an smartcoin with low volatility and long term return higher than the inflation rate.