Investors will leave cryptocurrency if they don't see the favor unto them anymore. They will just abandon the ship and lose patience because it's new to them to see the crypto market's fall. They aren't the real enthusiasts that will come with the market whether it goes up or goes down.
They are not real crypto fans who are ready to go up or down? Do they just want to make a profit and after that they leave? I think they also go for various reasons, and one of them is that there are often fraudulent projects. 