Bitcoin actually doesn't require approval to be used anywhere. You can use it as long as you have internet connection and a device.
Countries "approving" bitcoin just makes it actually legal to use and accept for merchants. correct me if I'm wrong
You nailed it! Bitcoin doesn't require approval from every country. They are just have their own point of view about it and they have warnings with their citizens because it is not regulated. Maybe Germany's recent approval of Bitcoin o ky means that they can see it as safe to invest.