What is practical for average people in their everyday use? You gotta have physical cash or coin Bitcoin. Perhaps a CR code hash printed on each coin or piece of paper, would be better than a written address. But you would need something like this so that when trading hands between live people, the receiver could use his phone to check if the paper or the coin was the legitimate form of the chunk of Bitcoin listed on it. Take a look at https://softnote.com/ and https://tectum.io/softnote/ to see a company trying to do this.