Because crypto can be said to be too early for everyone in the world even though in fact in some countries crypto is already very popular, but in some countries it may still be foreign and even completely unknown.
So you have to introduce it little by little to your parents so that they understand.
actually telling the people around us is not difficult if we already have something real from crypto. like real assets that we get from crypto. and the easy way to explain it is related to the investment we make.
what is difficult is when educated people know it but do not accept it. like the government of a country that rejects crypto. they know but are unable to take the risk and let it pass.