I never like people with only simple thinking "get rich quick" on crypto scene. Put that aside, risk equal with profit. If people understand how much risk is for a crypto investment then that's their choice, you can't force them to use it as a different means.
The same thing could be said about people who are negative towards the overenthusiastic investors.
Some people are greedy, some are enthusiastic, some are skeptical but all of them should have a chance to invest. If you're greedy you could be disappointed but you as well could succeed.
In 2017 those who bought and held were successful no mather what attitude they had. They all had a good timing and that was enough.