Value of currency is measured by how much it moves... Even if you print very large amount of currency, it can be worth a lot as long as it keeps moving... When people start HODLing it, it loses its value.

This is also why some currencies that start basically as shitcoins can end up being worth a lot, Dogecoin is pretty good example.

Any "other" cryptocurrency that has Dogecoin market pair, will essentially increase value of Dogecoin and vice versa.