He is answering a thread called "What will happen when the mining ends?"
Well there are only 21 million bitcoins in total and when all bitcoins have been mined essentially miners will no longer recieve a block reward for validating transactions. In this case, miners will need to rely on transaction fees in order to maintain operations. This will inevitably mean that transaction fees will have to be higher in order to continue to incentive them to maintain operations profitabily.
On the other hand one could argue that over time that mining chips will become smaller more efficient then they are today and that therefore the mining process will become cheaper, allowing for the transaction fees to be sufficient incentive for miners to continue operations
On the other hand one could argue that over time that mining chips will become smaller more efficient then they are today and that therefore the mining process will become cheaper, allowing for the transaction fees to be sufficient incentive for miners to continue operations
Google the title of the thread and you will end up in this page, which he copied his text from: https://www.investopedia.com/news/what-happens-bitcoin-after-all-21-million-are-mined/
Quote
In fact, there are only 21 million Bitcoins that can be mined in total [...]
In this case, these miners may need to rely on transaction fees in order to maintain operations [...]
On the other hand, there are reasons to believe that transaction fees and mining costs will even out in the future. Looking ahead by several decades, it is not difficult to imagine that mining chips will become small and highly efficient.
In this case, these miners may need to rely on transaction fees in order to maintain operations [...]
On the other hand, there are reasons to believe that transaction fees and mining costs will even out in the future. Looking ahead by several decades, it is not difficult to imagine that mining chips will become small and highly efficient.
It happens by the way. 
