So as I originally stated I think the most PROBABLE scenario is that we continue to have exponential growth for near term. Any economic model should be based on the most probable scenario don't the collapse of civilization as we know it.
So my assumptions about your beliefs are wrong but the reality is even worse... you are only planning on the now and current and not something viable for hundreds of years and hopefully longer.... I don't let the short term now greed and impulse factor cloud my judgement that the world needs something better that will last well beyond my lifetime. Making a buck now is great but giving something that gives my great great grand children a better chance at a good economic future and freedom is far greater.
Unless you assumptions about long term 1000+ future blind you to the reality in short term and the system never lives beyond the short term. Hate to break it to you but if we go into a technological dark age your ScamCoins aren't going to do your grandkids any good. Good farming land, a deep well, firearms, and enough muscle to ensure nobody takes it would be worth a lot more.