"No Keys = No Cheese" means if you do not self custody your Bitcoin yourself, e.g. by removing it from the exchanges, then technically you do not own it. One of Bitcoins most useful attributes is allowing individuals to be fully sovereign.
There are other cool items available in this collection, check them out here.
Dad hats aren't just for dads. This one's got a low profile with an adjustable strap and curved visor.