Bitcoin is the most popular, because it is the first digital currency, which we can invest anytime and we can use around the world. Easy to use, especially in paying our bills, no taxes and fast in all transactions. The price is very expensive and gives a good profit. Bitcoin is just a high-priced currency, and is in great demand, because of its popularity and it gives more benefits to society. Bitcoin has great value compared to other currencies, which is why bitcoin is so popular.