Even when multiple miners divided these benefits, there is still sufficient reward to pursue them. Each time a brand-new block is mined, the successful miner gets a lot of freshly created bitcoins. Initially, it was 50, however then it halved to 25, and now it is 12. 5 (about $119,000 in October 2019).
At that point, all 21 million bitcoins will have been mined, and miners will depend solely on fees to maintain the network. When Bitcoin was released, it was planned that the overall supply of the cryptocurrency would be 21 million tokens. The reality that miners have organized themselves into pools worries some.
They might also obstruct others' transactions. Simply put, this swimming pool of miners would have the power to overwhelm the distributed nature of the system, verifying fraudulent transactions by virtue of the majority power it would hold. That might spell completion of Bitcoin, but even a so-called 51% attack would probably not make it possible for the bad actors to reverse old transactions because the proof of work requirement makes that process so labor-intensive.
When you manage the entire currency, with whom can you trade? A 51% attack is a financially self-destructive proposition from the miners' viewpoint. When, More In-Depth swimming pool, reached 51% of the network's computing power in 2014, it willingly promised to not go beyond 39. 99% of the Bitcoin hash rate in order to keep confidence in the cryptocurrency's worth.