Is buying Bitcoin or cryptocurrency good for Kids?
It's a good thing, bitcoin is an investment and you are supposed to put some money for your kids and what better way for them to have a savings than having their own bitcoin, the way that bitcoin appreciates is something that any parents should look out for in terms of creating a savings for their kids. @LoyceV got a donation link for his kids in his other account if I recall so the only caveat is that the kids don't have to handle bitcoin right now when they're young.
How do you teach a kid to secure Bitcoin incase you are not there?
I don't think that it's something that they have to worry about to be honest, I feel like bitcoin security or even the introduction to it should be around the time that they can independently navigate computers, a little here and there lessons in cyber safety could go a long way but putting them straight up when they should be playing or doing kid stuff.
Should authorities or agencies place age restriction on owning Bitcoin?
If it's me, it's not the right thing to do but we can see why they want to put some restrictions, it involves money after all and it also helps that there's no way that an incident where a kid accidentally trades or gives away bitcoins if there are restrictions.