We can explain with math types that the total number of bitcoin t can be mined in total are only 21 millions.
We can use some math calculations.
- A 50-bitcoin reward for each mined block;
- This reward is cut in half every 210000 blocks;
- The indivisible minimum Bitcoin unit is 0.00000001 Bitcoin (which corresponds to 1 Satoshi).
By calculating that 10 minute average time to mine a block, the total will be 21 million as shown in the equations below.
Factoring out common terms (50*210,000) we get the following equation.
The later part of the equation adds up to 2 (or very close to 2) tending to infinity. This collapses the equation to;