Sorry to be a bit off topic here, but: while I agree with the other comments here about this company being very early stage to have such a large market value, what I think a lot of people tend to forget that the dollar has lost a lot of value over the last 5, 10, 20 yers. A billion dollars isn’t what it used to be.
What is not clear is if this company has strong patent protection for their innovation of sharing blockchain. I would guess that this might be why they have a high paper value.