Many cryptocurrencies, such as Bitcoin, have a specific supply. Therefore, cryptocurrencies are considered highly scarce digital commodities. For example, in the case of Bitcoin, the total amount of Bitcoin that could ever be issued is almost 21 million. The total number of Bitcoin tokens created for every block would be reduced by half at a gap of four years. The process is known as halving, and the final halving would be completed in the year 2140.