Why not ETF into BTC? (please destroy my thought process and help me learn)

Let's say I care about my family's future first and foremost. I don't want to deal with high risk, potential access issues with my BTC in the future, government fuckery, etc. I won't have enough capital gains withdrawals in any given year to worry about taxes, IRS standoffs ala Ruby Ridge, etc. Why wouldn't I just buy into a spot ETF and not worry about it?