Yes they should. They have nothing to lose after all, and the amount of money they possess is usually low, so winning a bit will help them a lot.
how do you know that they possess low amount of money? You would not know the knowledge and experience of youngsters in the field of internet as well as in earning bitcoin, lot of youngsters have much bitcoin so that they can buy their own car. Betting is another personal interest of youngsters, we dont know how much they want to bet.
I think most young people are more fond of challenges and risks. And I do not think he uses a low amount for investment. But I think they use all the capital he has for what they believe. I'm sure they've used up all their money for investing in bitcoin, because young people usually like challenges