The rate of inflation in the world is increasing. Money devalues too quickly, so that people do not even have time to make savings. This is why diflationary coins are so popular.
Cryptocurrency is becoming a good alternative to the existing fiat system. Therefore, more and more people are now using cryptocurrency for trading and investment purposes.
Cryptocurrencies are very volatile and they allow you to earn significant amounts on the fluctuation of the exchange rate, so the volume of trading on the exchanges is so large and many new exchanges appear.