[codebje]

You're placing a heck of a lot of trust in a digital system if you're putting a significant (as in "I would hate to lose this") sum of money into it in the expectation it'll still be there in the future.

Even if we put aside the problem of unstable valuation, forks, and potential total collapse of cryptocurrencies, you're going to face the challenge of keeping a private key secure for however many years you plan to escrow the money.

Compared to creating a trust account, this is insanely risky - you'd have to be convinced that the legal and banking systems were facing imminent catastrophic collapse to think that's better than what we've got.