The current coinbase reward on each completed block is 6.25BTC.
It stopped being 25 after the halving in 2016.
The reason for this is that when there are more people in the world, there will be more transactions taking place. This means that there will be more money being spent on goods and services than there was before.
First, the increased use of bitcoin could reduce the cost of living for some people around the world. This would lead to an increase in standards of living for those who have access to this new form of currency.
Second, the popularity of bitcoin could lead to an increase in wealth among those who own it. If you can invest your money in bitcoins and make a profit, then you have more money than ever before!
Third, there is also a possibility that new jobs will be created as companies begin accepting bitcoin payments.