system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do countries increase their currency value?

Like do they have to have alot of money to make their currency high in value? Like why is a euro 14 cents higher than a us dollar?
gpt
Currency values mostly don't matter, in terms of which one is worth more, at any given moment. You use them to exchange things. If you paid in units of ten dollars, one would be worth more than a Euro.

The extremes, however, are more important - currencies which lose all their value and get exchanged in enormous amounts (millions, billions, trillions) for everyday goods are the result of inflation - the government has the ability to print more money, so they do so in order to pay for debts etc, but by diluting the value of money each one is worth less.

At the opposite end are currencies like CHF and USD have gradually become more valuable compared to others. 200 years ago, 1 GBP was worth 5 USD, now it is only 1.20 or so. 

The strength of a currency generally reflects the long term stability and expenditure of its government - bonds (debts) are issued in that currency, so it is in the interests of a government for people buying those bonds (lending money to the government) to believe that the value of the currency will stay high.

Governments sometimes default (fail to pay) on their debts - this has been a problem in some regions, and also reduces the value investors place on the loans.

A government that wanted to increase the value of its currency relative to others in the long run would be well placed to create an independent central bank and give it a target interest rate, usually around 2%. This starts to offer investors hope that the government will stop just printing money. However, it also relies on a strong economy; when governments have good tax income, they need less borrowing and can sustain debt payments.

For this reason, a common theme has been for currencies which have lost a lot of value to be replaced by a new currency by a new government. When they do so, they are free to choose what the starting value would be, which is why the exact current value is far less important than the rate at which it is changing vs other currencies.

Some currencies are locked to others, either by the government guaranteeing an exchange rate or by entering a currency union (e.g. the EU projects of the ECU and the Euro).