Naming children is a difficult subject. In the European country where I live, it would probably not be possible to name a child Bitcoin. But in other countries like the US, there seems to be more freedom in this regard.
It is always a question of whether you are doing a child a favor with such an unusual name. I think, rather not. If you absolutely want to give a very unusual name, I would rather consider it as a middle name, for example. For example, Oliver Bitcoin + last name. That way, the child can choose whether to use the middle name in everyday life or to keep it a secret.
Personally, I would not give Bitcoin as a name at all.