Here's a hot tip for you:
A much cheaper insurance (actually an unbelievably $0 insurance!) would be this method:
take a loan on the property and then buy "something" in the regular stock market, plus sell its ATM Call options and buy its ATM Put options. It costs you net $0. This then locks (freezes) the initial value of the underlying. Ie. no loss possible at all, and everything is insured & secured!...
Enjoy!
The net cost of this method is of course not $0 but the interest to pay for the loan.
(But it theoretically really costs $0 when no loan is involved, ie. when insuring an existing stock position against any losses. But then interest for margin use could apply...)
This is similar to the above linked Armstrong method, but IMO much easier to apply in practice.