Some people invest in Bitcoin with a hope of making quick money, that's not how it works. Crypto market is a growing market and less than 20 % of world population is aware and willing to invest in it. Over the period of time, the user base will grow so as the investment. Slow and gradual growth.
Although now, you cannot really make quick good money on the cryptocurrency, many people think that this is possible. Such guys can be disappointed in crypto soon. Thoughtful people study the market, and then enter it to work and earn.