First and foremost, conducting cryptocurrency trading is really risky. Second, this aspect is not easy to understand immediately, you know that.

      But if he is really eager to learn, there is nothing wrong with that if he makes the excuse himself and shows you that he is really interested. Just explain it to him in a way that he can easily understand. And since there are exchanges that need to have kyc, maybe you should teach trading in DEX first, it can also be done in centralized ones but in your account if it's your son, nephew or whatever.

If they are really eager, there might be something they see interesting about why they like trading at that age.

Therefore, let them enter the world of trading and guide them. Of course, just put them on the learning and studying part and not at the point that they will risk some money. They should get there soon.

You can observe that kid along the way and see if there's a significant change in his interest in trading, whether he really likes it or is just being carried away by something that he saw before on why there's an interest in doing it.

Trading is a skill and as much as the kid has passion for it and is able to graps what the charts are saying, it's no bad. I have came across a child of 15 years on YouTube that is very good in Chart/market analysis, precisely Bitcoin and also does some trading himself at his age. The main point and bottom line is what the kids are capable of doing, therefore I don't think it a bad if a 10-15 years kids gets involved in trading, however most preferable age to actually get my kids fully involved in trading will be from that of 14 years above, from this age they will be able to deal with emotions which is critical part of trading.

I don't think it would be illegal because I've never heard of such a thing. But in my opinion it would be better to bring the kid in this line after 18 years. Because trading is very risky, there is a high risk of fund loss, and since under-aged children's understanding will be lower than that of a normal person, there is a possibility that they will make mistakes. But they can be given the basics but the details will be better taught after the age of eighteen.

Trading is not illegal so there’s nothing wrong to educate them at the early age as long as your intention is good and its your own kids. This is also my dream, to educate them financially and make them realize how hard to make money do that they can value it more than i do. Trading might complicated for them but in time they can get it, you have to share your knowledge to them in a timeline basis and don’t force them to get it in an instant, learning takes time and with trading they have to understand everything.

You could teach them and also help managed their risk by been their guide to avoid them putting too much capital that could affect then if the lose in the trade. 15 years isn't too young, atleast a 15yeaes old could understand what you're teaching them and if they practice constantly using demo accounts they'll be professional when they're 18.

It'll be a good start to life as they won't have to rely on the system of 9-5 that has been designed by the government but can already make their own money and with their years of experience they'll ahead of others in the same trading market.

Trading is a risky activity, not only for 10-15 year olds, but all traders will take that risk.
Children aged less than 15 years have more unstable emotions than children who are already teenagers. You may be able to infiltrate their cognitive abilities little by little, trying to teach them complex things and trying to help them control their emotions. But I'd be inclined to disapprove of teaching them about trading that fast.

I tend to agree more when parents succeed and help them in their academic pursuits rather than trying to get them to make money on their own when they are under 15 years old, but of course someone can disagree with me. Just follow the growth process as long as they are not ready about the complex issues of trading, and support them about the skills instead of teaching them trading.

As long as it's not illegal you could always teach them, and you can do that without using real money so the fear of losing money has been eliminated.
Just look for a good simulator and let them engage their selves in it, before you'll realize it they would already be able to read charts and do so many other things, don't let age restrict your children from knowing what will help them financially trading may be to make them to be financially independent when they finally start real trading   

I don't know about the laws in your country, but in my country it's legal for children to have their own brokerage account as long as the parents agree and take the risks. When I turned 16 I got my first investment account from my grand parents. I still remember that my parents had to fill out a lot of forms before I could actually sell and buy new stocks. It was all done with a bank where also my parents accounts were, so the bank knew there was enough capital to cover any losses. This was of course the lowest level of trading, only major stocks allowed without leverage and no advanced financial products. I think it's good if our children are interested in the financial industry and we should support their curiosity. It's also important they learn about the risks involved and should start very small.

Well, trading is very risky and plus when a kid trades it becomes more riskier but if a kid wants to "only" learn how to trade then we can give them a try and some guidance. Don't make them try to learn to trade and end up becoming an addiction because don't have the knowledge and depend on his luck. You can wait until he a little grow up because 4 years is not that long.