A short lesson in economic history:  The US dollar is the de facto world currency and has been basically since WW2.  

For any cross-currency bookings, the guest service fee will include additional charges which could be as high as 16.5%. 2.

The statutory definition of securities is as follows:The term “security” means any note, stock, treasury stock, security future, security-based swap, bond, debenture, evidence of indebtedness, certificate of interest or participation in any profit-sharing agreement, collateral-trust certificate, preorganization certificate or subscription, transferable share, investment contract, voting-trust certificate, certificate of deposit for a security, fractional undivided interest in oil, gas, or other mineral rights, any put, call, straddle, option, or privilege on any security, certificate of deposit, or group or index of securities (including any interest therein or based on the value thereof), or any put, call, straddle, option, or privilege entered into on a national securities exchange relating to foreign currency, or, in general, any interest or instrument commonly known as a “security”, or any certificate of interest or participation in, temporary or interim certificate for, receipt for, guarantee of, or warrant or right to subscribe to or purchase, any of the foregoing.

I've been trading currencies and investing in stock options since I was 14 years old.

Stamps are almost like currency.  

When the economy suffers as a result of too much of a contraction, debt payments are harder to make, etc, then go through the cycle of loosening it again, devaluing the currency so debt payments are easier to make, and banks can profit higher than before.

I also recommend you study past and present economy and fiat currency (good lord, this is boring to me, but so important), to better understand what's happening and where our economy is going- as it will help you invest wisely, and understand crash/boom timing.

Comparative to your market.Currency vs currency impact?

@Nathan Asher Robson I would look into currency hedging products.

Which is a one world govt, currency and ultimately religion.