In reality this poll shows, that there are more or less no people under 20 in the crypto space. This surprises me a lot actually.
The lack of younger generation does not surprise me. Only few from a hundred (just a random example) think about the next day. Only few realize that they should start building their future today or even should have started yesterday, but not after they graduate from college. Somehow I am sure that current teenager, instead of investing money, would spend most of them in one day. In fact, a pack of chips, a can of coke or candies today are more valuable then, lets say, having own car in 5 years.
I've noticed that parents care to much about their children. A lot of kids at the age of 20+ still live with parents, while a tens years ago, a lot preferred to leave the house when they hit 18 and start their own life. When you get a lot for nothing, by bother about investment, earning, developing.
Besides, it is summer now. If you would have created this poll in winter, I think results would be a bit different.