Why are Billionaires Preparing for a Major U.S. Crisis?

Financial Researcher, Stransberry said: Things may seem OK -

but here's what's really happening and the simple steps you must take NOW to protect yourself immediately…
Dear Fellow American,
On the surface, everything in America seems OK.
But if that’s the case, why are so many wealthy and well-connected people quietly preparing for a collapse of the federal government… and complete social disorder?
The list of folks who’ve established some type of escape plan or “bolt-hole” is startling…
Steve Huffman is the founder and CEO of Reddit… an internet firm worth at least $500 million.
Huffman says he’s getting ready for, “the temporary collapse of our government and structures…”

One successful U.S. hedge fund manager moved his entire family to Singapore. He says the government “has no clue what they are doing. They are going to ruin
us all."

Another hedge fund manager, billionaire Kyle Bass, built a 41,000-square foot ranch stocked with firearms and gold.

Peter Thiel, the billionaire founder of PayPal, paid $10 million for a second
passport and a 400-acre estate in New Zealand.

A.G. Martínez, a former Facebook product manager, bought an island in the Pacific Northwest and stocked it with generators, solar panels, and ammunition.

He says: “I think people who are particularly attuned to the levers by which society actually works understand that we are skating on really thin cultural ice right now.”
Robert Dugger, a former partner at the global hedge fund Tudor Investment Corporation, says:

“people… are worried that America is heading toward something like the Russian Revolution.”

And when Reid Hoffman, the billionaire founder and CEO of LinkedIn, was asked what percentage of Silicon Valley billionaires are preparing for a major crisis, he answered: “50%+.”
Why are all these people so concerned?
What do they know that you don’t?