Well, the age limit is just a compromise by the government to forcefully stop those minors from gambling tbh. The best solution would be for parents to properly teach and educate their kids about these kinds of things early on, but well, that's not exactly easy. I myself have gambled back then when I was just 15,16 years old and damn when I lose do I regret so much playing. To answer your question, well, it is needed since the education system isn't really perfect, and additionally, I call it a compromise since really, as long as anyone has the knowledge of how to stuff, they can access gambling channels even if they were minors, though that's mostly by the age of 16 or 17.
Does the age even hold a meaning? Should it be regulated ? Since Crypto gambling sites have to be super private and therefore regulating the age is a big factor.
Should steps be taken to take care that we don't being up a generation of addictive gamblers or it's all good ?
Nah, I don't think addiction would be that widespread or anything. The first thoughts whenever you gamble and you lose is actually fear instead of enjoyment imo. This fear causes most, if not all people to lose their sense of enjoyment regarding something and hence would quit it instead. Not to mention that gambling involves money. Only a minority would actually win big and hence, start thinking that gambling is easy and stuff like that, hence falling into addiction.