Better tell owners of these investments then since I don't think they read your explanation either  

Anglo American (Yield: 15.3%)
BHP Billton (Yield: 11.6%)
Glencore (Yield: 11.4%)
Vedanta Resources (Yield: 10.6%)
Amec Foster Wheeler (Yield: 10.4%)
Standard Chartered (Yield: 9.8%)
Rio Tinto (Yield: 8.1%)
Royal Dutch Shell (Yield: 8.1%)
Aberdeen Asset Management (Yield: 8%)

In economic theory, supernormal profits are unsustainable - that is true. But thats long run market behaviour and in the case of an asset like Dash would take the form of competing cryptocurrencies implementing a similar investment / revenue model. Even then, the dilution of gains would only manifest itself in dollar terms since the yield on a given principle (measured in Dash) is fixed.

Bring 'em on !!