Yes, and now it's super easy with Alby Hub's - you just generate NWC string and they can reuse it in their wallets, we have separate balances, so eventually it's a subaccount, already few friends onboarded
i custody my kids birthday money in btc every year that i also custody.
the plan is to stack for my kids and then let them have it when they're 18 or 21, depending on if i think they are mature enough and after i have made sure they properly understand how everything works etc
the bitcoin network custodies "my bitcoin" and the "bitcoin of everyone" who needs custody. i don't even know which are all the nodes that have "my bitcoin." i merely have some limited operating rights of the network code. i own nothing. my hands are clean.