A few very important points are missing in this article.
- First not 25 but only 12.5 BTC comes with every new block
- Aproximatelly every 4 years the reward for a founded new block decreases by half. The mined supply will stop, when the the reward for for the new bock will be 1 satoshi, (the smallect particle by todays rules ), and the next halving comes. Though not possible to have a half satoshi block reward. Sure, unless the rules change. This will depent on the BTC price those days, and many many more things to happen during next 140 years. No much reasons to speculate about this today.
- Bitcoin supply declines EXPONENTIALLY. And while it will take --140 years to reach 1 satoshi block reward, in the last ~40 years of this named period less than ONE single Bitcoin will be mined ALLTOGETHER. 1BTC in a whole world in a long 40 years. !!!