If you could have one comp license?

Would it be FIA? Will scca recognize an fia comp license? Learn me. 
 

thanks!

If you're in the US, SCCA is your best bet IME

Also:

https://www.raceronrails.com/getting-an-fia-racing-license/

depends on what kind of racing you plan to do. 

SCCA license won't do much for you if you want to Rally, for instance.

ARA license won't do anything for you if you want to race on a track....

I guess 

part 1)

What's the most widely recognized by the most sanctioning bodies? 

part 2) 

Which one will translate into most valuable others with just a bit of dough? Like if you have an fia or a scca will most others just set you up if you pay without jumping through hoops? 
 

I've got some resources, career experience, and am willing to do what is necessary within reason to facilitate. The goal is to have the most variety of rides in racecars available career wise globally.

I know this is vague, there's something cooking that seems like it's going to be super cool but I can't disclose it at this point. 

An FiA license is basically the universal passport. 

JG Pasterjak said:

An FiA license is basically the universal passport. 

That's exactly what I'm looking for. Thank you! 

I should clarify that an FiA International License, Grade C or better + cash will get you nearly any other type of license anywhere in the world at a club or entry-level pro level.