I'm not sure what relevance that has to my assertion? If a/the market goes up 50% you'd be poorly advised to hold cash rather than put it in the market.

No one should ever hold cash long term as an investment, but the graph shows pretty clearly there is nothing at the moment that has not been the trend for literally 50+ years.

Calling that "Cash is being decimated by asset inflation before our very eyes" seems to be undue hysteria.