The CBN act of 2007 gives CBN right to print new naira note endlessly to replace and add to existing note. The United State Bureau of Engraving and Printing under the United States department of Treasury can also print endless Dollar note. This is the way it is for plenty of the country we know. Bitcoin is not like that. Bitcoin supply is fixed and it is only Twenty One Million that will ever be. It's programmed so it will not exceed that amount. That is why plenty person always say
BTC is scare. This scarcity is one of the thing that make
BTC good for storing person wealth for long time.
To know where the scarcity come from we will look at how bitcoin is issued.
In 2009, when
BTC come out, every time a new block of transaction is added to blockchain which can take ten minutes to happen, the network will create 50 new
BTC as incentives for miners who used their computer power to first solve the POW puzzle and add to the block. The reward did not stay the same. After every 210,000 block the reward would be cut into half. This is called halving and it happens every four year cycle in this way~
50 > 25 > 12.5 > 6.25 > 3.125 >

In the image the new
BTC reward keeps reducing after every four years. And as it is reducing so is the supply rate. And the more it goes on, eventually in the year 2140, new bitcoin circulation
BTC will come to zero leaving only transaction fees as rewards for miner. This shrinking in new block reward creates scarcity.