My classmates asked that question and the professor kept on talking about the probability of getting scammed but he's really against the whole crypto-currency movement so his opinion is biased.
So...here I am, asking for guidance...
For one, scamming is not only common in crypto, its everywhere. If you are to apply this kind of logic, then you should never cross the road because there's a chance you could be killed. Its all about you acknowledging the risk and being careful. The internet has a lot of opportunities but these can also be misfortunate at the same time.