Whats to stop more than 21m Bitcoin being mined

[imapessimist]

If somebody decides they will allow more than 21m Bitcoin to be mined who will say they can't do this or who would stop them. 

[mk4]

If someone would want to have more than 21million, a hardfork would be needed. Meaning, that coin would be a separate version of bitcoin if someone were to alter that. Also, if some people we're to want this, some people definitely wouldn't. So that's going to end up having another split in the community(just like BTC vs BCH).

[dothebeats]

The hard-coded limit stops them from doing so. Also, if they want to create their own version of bitcoin with more than 21m mineable coins, then they need to fork off from the main chain and start from there, see whether someone would support their idea. 21m coins isn't even sure to be exhausted by 2140 by PoW because by then, if we still sticked to the same algorithm, difficulty would be extremely high and the amount of energy needed to mine a single bitcoin is too high as well.

[MakeMoneyBtc]

Thats not possible at all because the system of bitcpin is created to support only 21M coins. In order to create new bitcoins they would have to create another version of bitcoim wich is hard to do.

There is notthing sure right now because it will take at least 100 more years in order for all of the remaining bitcoin until 21M will be mined so we dont know what happens in all this time. The last million bitcoins would be very very hard to mine and it will take a lot of years to mine it. We dont know where the price will go, we dont know what banks and governments will do against bitcoin we dont know if a new coin will replace bitcoin. Everything is possible.