Are there such things as time locked transactions with a single key? Do they send the transaction with a date in the future? What happens if you lose the key the coins are destined for before you reach retirement age?
I have heard that one can make a transaction which will not confirm before a predetermined block. I am not sure about the details, but the coins will be in limbo for the time being, receiving address will be able to spend it when it gets 1 confirmation in the predetermined future.