When a country imports more than it exports, it can seem like a bad deal, but it often leads to gaining valuable goods. The value comes from the items received, not the currency exchanged.
People usually trust money because they need it to pay taxes. This makes currency valuable even if it seems like just paper.
If a country keeps trading real goods for currency without producing anything in return, it could face problems later. Eventually, the countries trading with it may realize they’re not getting fair value.