If Quantum Immortality is true and you can experience only your own survival then imagine this: You buy a lottery ticket; after that you create a room with a sufficient number of guns guns pointed at your head (for added redundancy – i.e. a big number guarantees your death if they fire at the same time). The triggering system is connected to a sufficiently secure data channel that will guarantee the security of the connection (i can’t imagine a 100% secure network but for the present matter we’ll accept this premise) through which it will receive the lottery numbers. The guns will be programmed to fire at your head at the same time if the lottery numbers do not match the ticket you played.