Luxembourg will also invest in research and development for technologies needed to identify, extract, and process minerals, water, and other valuable space-based commodities.
Stop quoting fake news. They aren't mining jack shit in space for a loooong time if ever because the cost of production would be enormous. Your quote doesn't even pass an elementary common sense test when they talk about "mining water" in space. We are not hard up enough for water where we need to spend $100,000 per gallon to mine it in space.
Even if some company like this is actually created, it's just like one of those shale oil companies they have people can invest in but will never ever turn a profit. Even if gold was revalued to $20,000 and silver to $1000 tomorrow, it would probably still not be doable or profitable. They would also mine somewhere like the ocean floor or Antarctica long before doing something like this.
Wouldn't even simply mining deeper be far more economical than space ventures as well? Not sure why people always go for the asteroid mining to argue that we can have a plentiful supply of PMs. Compared to an asteroid, the Earth is magnitudes of orders bigger. We've barely pecked the surface when it comes to mining.