I'm not sure it's because I think people who use bitcoin will be more and more and that will be the reason that prices will increase and make all its profit. support factors that will answer the future of bitcoin. if bitcoin is not used and nobody invests then bitcoin will run out.
That is not the only reason that will keep Bitcoin alive but there are much more in the list and prominent among them is the fact that Bitcoin has been accepted and recognized by almost all the companies across Europe and USA and this is something thing that has added to the value of Bitcoin as well.
It is highly accepted as a mode of payment and has actually reduced the demand for cash as well as a result of which the printing of money will decrease and inflation can be controlled. There are so many reasons that people in future will prefer Bitcoin over fiat and so the future will be great for Bitcoin.