For years occasionally I've been talking with a friend of mine about Bitcoin and never seemed to be interested. Five years ago I gave him €30 in bitcoin by sending it to a wallet on his phone and explained how to keep it safe.

Five years later and multiple new phones, he found his backup words, installed a wallet and did a restore. He was very surprised to see that its value had gone up 7x to €210. He's now interested to buy and wants to know more about Bitcoin :-)