Bitcoin is the king of all coins because all coins depend on Bitcoin. Bitcoin is well known as one of the most demanded coins in the market today. And the best aspect is that the transaction is completed without any third party due to which it is in high demand nowadays. Currently more popular than fiat money. Because fiat money can only be traded in that country, but Bitcoin is a coin that is in circulation all over the world (people in all countries where it is legal are using it directly). It is widely used in almost all countries of the world, both secretly and openly, so keeping money in Bitcoin is much better than keeping money in banks.