0 kgs of gold and there are 10 people in your family. You now decide to distribute the gold between all the family members. However, instead of giving everyone 10 kg of physical gold, you give everyone a coupon that one could get 10 kg of gold in exchange for.
So 1 coupon = 10 kg of gold; 10 coupons = 10 x 10 kgs of gold. = 100 kgs of gold.
Now, each of those 10 members marry and bring a spouse into the family. Now, there are 20 members. However, the gold is still 100 kgs. In order to divide the gold equally among all members, you print 10 more coupons and hand them over to the new members of the family, while informing everyone that a coupon now can only be exchanged for 5 kgs of gold.
Therefore, after spouses come in: 1 coupon = 5 kg of gold; 20 coupons = 20 x 5 kgs of gold = 100 kgs of gold.
It should be obvious now that printing more coupons does not increase the value of the individual coupons because the 'wealth' of the family has not increased: it is still worth only 100 kgs of gold.
However, if by some great fortune, you were to now acquire additional 100 kgs of gold, each coupon now automatically becomes worth 10 kgs of gold.
1 coupon = 10 kgs of gold; 20 coupons = 20 x 10 kgs of gold = 200 kgs of gold.
A country too functions in much the same way where the currency note functions as a coupon that has an inherent value. Printing more currency notes (coupons) will only reduce their inherent value in direct proportion to the number of additional currency notes printed.
The value of currency notes increases only when the 'wealth' of the country increases. This wealth is typically measured in GDP, GNP etc. The more wealth a country creates and accumulates, the more valuable its currency notes become. Merely printing more currency notes will not make a country wealthy.