Shill me the best (in your opinion) cryptocurrency based tech for securely passing on an inheritance (chain agnostic)

I know about 'Mecenas' [1] but I am looking for alternatives, even proposals that are well described but perhaps not yet implemented.

One aspect I'm looking for (but your suggestions don't need to cover this):

• quantum computing resistant according to today's knowledge. I don't mean this to require that the funds or the data permitting access to them are unlocked on a QR blockchain, but that techniques used to release access to those funds/data are considered QR today.

[1] https://github.com/KarolTrzeszczkowski/Mecenas-recurring-payment-EC-plugin