This is a surprisingly interesting concept.
In a way, though, you're trying to call the bottom, but it's not just a financial bottom: it's a social/political bottom. You could in theory invest now while values have crashed, but this is a case where things could easily go lower when financial contracts break down entirely, offices where this information is stored get destroyed, etc. The reason the US (and other countries') financial system works so well is that policy and the rule of law keep it propped up. The US also has a very strong historical identity that, I believe, lends it a great deal of security relative to many other countries.
But there are many takes on all of this, so I'm interested to read other people's thoughts, too