This is what we export (2020) Warning: Real pathetic
Machinery including computers: US$182.6 billion (12.8% of total exports) Electrical machinery, equipment: $162.9 billion (11.4%) Mineral fuels including oil: $155.1 billion (10.8%) Vehicles: $105.2 billion (7.3%) Optical, technical, medical apparatus: $83.4 billion (5.8%) Aircraft, spacecraft: $80.9 billion (5.7%) Plastics, plastic articles: $60.2 billion (4.2%) Gems, precious metals: $60 billion (4.2%) Pharmaceuticals: $53.9 billion (3.8%) Organic chemicals: $34 billion (2.4%)
Half of the top export categories declined year over year: aircraft and spacecraft (down -40.5%), mineral fuels including oil (down -22.4%), vehicles (down -21%), organic chemicals (down -13.6%) and machinery including computers (down -11.3%).
...but we do have our currency (aka worthless paper)
London is nothing more than a currency hub. When nations exchange currency on an international level will leave the door open for all kinds of corruption as well as political intrigue. The proper way to handle major trade between nations is through a barter system. This would keep the books clean and keep the hyenas out ( Hyenas like Soros). Money exchanges would still exist but, on a much much smaller scale.