But, there is one more question to ask, if noncustodail wallet is used which is the best because of privacy, what about the issue of price downturn? Is it good to have bitcoin noncustodail retirement wallet at all? If yes, what percentage of monthly income should be saved?
I wouldn't worry about price down turn because most of the time we only look at the negative side of things but much as there is a downward movement of bitcoin price, we also have a positive price movement sometimes.
I think the percentage should just depend on how much one can really afford to save
Also, how can hire(s) be able to access the funds if anything just happend like death?
There is an option of
timelocking bitcoin transactions from an address though It won't be very accurate since no one surely knows when they will die.
I also read about an idea of a dead man's switch where a message contain instructions and information such how to access the private keys containing funds is sent to heirs in case there is no activity in the savings address. Maybe you could read further about it.
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https://hedgetrade.com/how-does-a-dead-mans-switch-work-in-crypto