Halving is the process of reducing the reward for mining a block to half. This mechanism can be defined in every cryptocurrency’s protocol and with it, the amount of coins injected in network. In the beginning of Bitcoin’s creation, the reward for finding a new block was 50 Bitcoins which has been in cut in half every four years. Right now the reward for finding a new block in Bitcoin is 12.5 Bitcoins. In May 2020 this amount will be reduced to 6.25 Bitcoins.