Are you American? That's what bitcoin IRA products are for. Send them here https://welcome.swanbitcoin.com for the basics and here https://www.swanbitcoin.com/bitcoin-ira when they start to get it.

Swan is my employer but Unchained has a similar product, probably others. You can also go the DIY route and set up a self directed IRA manually. This has been possible since before the genesis block. https://blog.lopp.net/how-to-invest-in-bitcoin-within-a-tax-advantaged-retirement-account/

If they can get it done before ETF approval they should see massive gainz. It is obviously a risky strategy, must have conviction.