Not sure what point you are making. Might bitcoin be part of a portfolio? Yes, as should all non-redundant speculative assets belong in a market portfolio.
I was attempting to discuss Greg's conclusions.
@jameslavish
If you work 40 hrs/wk: at 5% inflation and after 5 years, you need a 28% pay raise or to work 44 more hours (*one full extra week* per month+) to make up the difference.