So far as I know, the billion dollar or even a multiple billion dollar valuation is hearsay.
Gossip, chatter from the sewing circle, etc.
Until it's published with a name behind it, I'll continue to believe that it's wishful thinking.
Heck- even if it's worth a trillion dollars, it won't matter to me until such time that SFRX gets a salvage permit to bring it to the surface.