Roofstock makes more assertions on their site than some other sites and some investors buy into them.

If that's your assertion, then I agree a natural disaster or nuclear war could affect my cash flow!

What other assert has intrinsic value, predictable appreciation, and people will help you pay for it, i.e.

It’s basically just a notice that there’s a pending legal action where one party is asserting a claim to real property. 

Hello Account Closed,If you are using financing to get the house, you will sign a note (promise to pay the loan back) asserting that the residence will be your primary home for the first 12 months. 

Well, your agent isn't very sharp, or assertive, or they would have had you show proof of financing already.....but they will surely require it before submitting an actual offer, I'd hope.  

Which usually includes asserting ones belief that their own opinion is correct?

There's an immense amount of intrinsic satisfaction that comes along with providing hardworking people, great apartments; apartments that are better than what the market says their money should buy (if I may be so bold as to assert that...)  

The Constitution of most of our states (and of the United States) assert that all power is inherent in the people; that they may exercise it by themselves; that it is their right and duty to be at all times armed

These puny little humans go around and assert their will over the massive horses to make their business work - it is what it is.