Is the gold company worth to take ?

So companies only build the type of building that are assigned to them. in this case they only build gold mine. However, there are not that many gold mines in the game so the company won’t really grow beyond a certain size. Sure the 5% minting + company throughout bonus sounds good but for most major countries it’s not really that much money.

In contrast a company that can build machine or steel factory will be very useful and become a behemoth. Add in the company bonus to throughput , you will have a massive industry in no time.

So I wanted to know what do you guys think.