How serious should I take the cost approach to value of building the place new in today's currency and how does that potentially relate to a projected ARV? 

For stocks to ever reach 2009 levels, you'd need two things: 1) The most massive selloff ever seen by both big money and individuals2) Massive deflationMassive deflation could happen for a short period as long as consumers aren't spending...but with the strength of the dollar still as the reserve currency, it likely won't happen. 

“…if the market crashed, the value of the dollar declines dramatically (as well as other world currencies), what will the government do to secure the dollar?

I also am pretty focused on the crypto & silver markets for last couple years at the moment.My mining bet now a render farm in Oklahoma with asics mining & cheap natural gas mixed in is now tied to Disney.

@Jordan MurrellI recommend crypto & silver during these trying times!

Make sure it is deemed as a security token (backed by something tangible) and not a utility token (used only as currency in the system).

@Sean WildeI’m completely spitballing but what about cryptocurrency?

With too much currency sloshing around, prices skyrocket.

The reason the USA is the USA and the dollar is the standard or currency is because our debt obligations are sacrosanct.  

Traded cryptos for about 2 years until I widened up to stocks.