They are from two different worlds. And they can be compared - but to no avail, in fact.
They will simply coexist just like they do now, even if one would bring more than the other.
Bitcoin investment, real estate Gol and silver are both good forms of investment; they are not going to replace each other. Bitcoin did not come to replace any in the first place but to serve as an alternative in whatever purpose anyone wants to use it for. The market cap and how other pictures it will vary, but that none of them will completely push the other into dust and render it valueless