Biometric chip implant that is set to send the data to a node the moment your vital signs stop for more than x?
Chip malfunctions, all your coins are gone, sorry!
- before the timelock expires, you have to move your coins, otherwise the other party gets access to them.
Two ways around this. First of all, you don't have to move
all your coins to invalidate the transaction. Moving just a single input would invalidate a transaction with many inputs. So you could create a transaction sending money from (for example) 5 cold storage addresses and 1 hot wallet address, and you would only need to send the small amount of coins out of the hot wallet address to invalidate the entire transaction without having to touch the cold storage coins. The second option is you simply don't share the timelocked transaction with anyway. Create it, sign it, and then store it (again, for example) in a safe in your house that your relatives would break in to after you die. Whenever the timelock is approaching, destroy your transaction and replace it with a new one further in the future.