Another aspect of this is you die before parents like what happened to a family recently. They only found out he had bitcoin through his banking history and seeing these repeated transactions to a exchange. They contacted the exchange and are in the process of figuring out ownership.

Think how often that is going to happen to bitcoiners when the majority have no idea what a wallet is or how to navigate it.

Saving for the kids is a fine goal if you stay on top of the investment and pull out if it gets to swingy. If you plan to sit on it till they mature and not do any trading,  then I think there may be issues.