If it allowed me to teleport between dimensions as well, definitely moving to that one parallel Earth where everything is peaceful, prices are cheap, and everything is seemingly perfect (except for the lottery system where a small group of people die if they win in a population control sort of scheme). Don’t take a lot of money and your odds of being picked are low.

Though, if it only worked for this world, probably just use it once to get to the kitchen faster at a random time because I can’t use it to get to college because of my class schedule. That, and I’m pretty sure my parents would find it suspicious if I suddenly teleported to a store and called either needing a ride or they cannot find me, especially if I don’t give them a heads up.