And you could even use SSS (Shamir's Secret Sharing - https://en.wikipedia.org/wiki/Shamir%27s_secret_sharing) to split the key to decrypt your confidential information across n people, such that some k (where k < n) of those people need to provide their share to get the key.

Then, for example, consider n = 5, k = 3 - if any 3 of 5 selected friends decide the trigger has been met, they can work together to decrypt the information. But a group of 2 of the 5 could not - reducing the chance of it leaking early if a key share is stolen / someone betrays or so on. It also reduces the chance of it not being released when it should, due someone refusing or being unable to act (in that case, up to 2 friends could be incapacitated, unwilling to follow the instructions, or whatever, and it could still be released).