Crypto currency is not just bitcoin, but more than a thousand altkoins and their numbers will only increase. Bitcoin and altcoin will interact and complement each other. In addition, bitcoin was originally created for this purpose. to have a higher cost. The small coin, satoshi, is the one hundredth part of a million bitcoin. Such a small coin does not have a single monetary unit in the world. Therefore, in the future, when bitcoin will have a high cost, basically not all bitcoins will run, and the small part is satoshi. In this case, 21 million bitcoin will be enough to sell all over the world, my hopes and prayers to always be a thankful person and that keeps us away from the greedy nature.