<rant alert>
In these days of mass anxiety there are no doubt some capitalists are concerned about the rabble. Nick Hanaeur comes to mind. However, the problem seems not so much how the rabble will react but a system whose rewards are based on profit. This system is presently running amuck and eating its own tail; as predicted by Marx in Das Kapital.
All money fiat money is debt... or generated via debt. If you are a tax slave then that is your debt. Negative interest rates give no value to saving fiat. Coming to a bank near you, if not there already.
Without trying to sound like an analysis or adviser, my personal feeling is that crypto is going to play a huge role in the next stage of the evolution of the world economy. The concepts that STEEM's DPoS is playing with shall have far reaching influences in that evolution in my opinion.
</rant alert>
[Edit: duplicate word struck out]