That is true. Even Bitcoin is decentralized, I think there are only few Users that use bitcoin as a payment.On the contrary, A lot of people use bitcoin for trading to get profits.
Bitcoin is like a stock market . It is way to get more moneys to become rich.
Bitcoin is a coin that can be manipulated at any time and this is a game that you need to be more careful from the start. This market is not like a stock market because all the coins in this market rely heavily on Bitcoin and even a slight change will make many other altcoins vulnerable. I'm not sure what the future of this market will be like but this is the best place to make a profit if you have good knowledge.