Of course its possible, but need a very long time to reach it. maybe 2 or 3 years.
If you want to become a millionaire in two or three years, you have to invest a lot of money and have experience in trading. Or incredibly lucky. The ones who bought a few years ago had a better chance for a million dollars. Of course, now you can do it but you have to invest money well.
Million dollars are possible but luck is vital for this. For example you buy a coin and it makes 50x in a short period of time. In this case, you can earn crazy money. For rich people, it's easier to reach millions of dollars.