If you do a little research, you discover that once upon a time, Peter Thiel was quite the firebrand.  His concept of what PayPal was created for, and what it could become, was remarkably revolutionary and disruptive.  He was essentially an anarcho-bitcoin fanatic, with the goal of ending what he saw as a totally corrupt world financial system.

So there's two possibilities here.  Either 1.) he's back on track and hoping to right his past failure, or 2.) he's hoping to sell out again for even more this time.

I can't say that I favor the odds of either one of those over the other.