In Bitcoin, there is no central firm accountable for the handling of all transactions. Miners and nodes in the network have various roles in order for the system to operate. Economic motivations push the miners to utilize resources in the security of the network.
Miners of the Bitcoin network use dedicated computers to execute proof-of-work computations. Once the miner has generated an acceptable block, he receives a block reward in the form of new bitcoins and transaction fees. These newly created bitcoins are referred to as the block subsidy.
In addition, the Bitcoin network has a pre-programmed issuance program. The starting block subsidy was 50 BTC and is cut in half every 210,000 blocks. After the last halving of April 2024, the block subsidy is now 3.125 BTC. The planned subsidy cut slows the creation of new coins.
These are the economic motivations that drive miners to invest their resources.
There is another type of incentive, which is transaction fees. The users can add fees to their transactions, and it is natural for miners to want to choose transactions, where there are more fees for block space used. If there is increased demand for block space, the users can compete and add fees.
The full nodes of Bitcoin have a different function. They check independently whether the blocks and transactions meet the consensus rules of the network. Running a node does not mean getting mining rewards since the nodes help enforce the rules by rejecting invalid data.
With the passing time, the block subsidy will keep on decreasing. Therefore, in this way, the Bitcoin network has made sure that the transaction fees play an increasingly significant role in the long-term incentives of miners. But the amount of fee revenue that the miners can get in the future will depend on the real use of the network and demand for block space.
The incentive system of Bitcoin does not solve all risks, but it makes sure that the earning of miners depends on the production of blocks. The transactions should be processed in accordance with the Bitcoin protocol.
