Ever heard of the petrodollar? The reason the dollar is strong is because everyone has to sell their oil in dollars. That's what it means to have reserve currency status. The currency with the largest GDP takes the title. So let's say China wants to buy oil from Iran. They must first convert their currency to USD and then purchase the oil. Then Iran convert those dollars back to their currency. Keeping the dollar in perpetual demand. Lots of under the table agreements keep this structure in place. US offer military protection or other things to different countries in return. The reason the USD is becoming weak is because the rothchilds keep printing mountains of the stuff.