I want to buy bitcoin as a future wedding gift for a young(ish) relative

With the premise that the gift is not really money, but time. Anyways, it’s possible these sats could just sit for a decade or two, so I’m curious about long term storage. It won’t be a crazy value amount today, but who knows years from now… I was thinking about picking up some cheap hardware wallets and loading those but am concerned they won’t be supported or will become obsolete. But I also want my relative to have a device to interface with rather than just a cold card. Do you guys have suggestions?