It is inappropriate to gift money for Christmas?

It is inappropriate to gift money for Christmas?

In my opinion it depends.

Generally I think it's appropriate gift of small sums (50-100€) to teenagers and students, so they can buy themselves what they prefer - that's what I did with my brother and my wife's cousin.

Updates
4 mo
Someone here wrote a really good answer, that it's a good gift for young people.
I'm "just" 26, but I admit I have no idea what things teenagers like my brother or wife's cousins are into, so monetary gifts are the best choice so I know they will be getting something they like or that they need.
It is inappropriate to gift money for Christmas?
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