I hope this will be useful for those who still store bitcoins on the exchange, you should think about security and hold your coins on hardware wallets.
Yes definitely don't leave any coins laying around on the exchange, the security risk is way too high. When we recommend it teach somebody about bitcoin and other crypto coins it's important that we make them aware of the security risks. There have been big scandals in the past and it's up to all of us to not repeat the same mistakes again. In my family only one person is holding also crypto currencies, my cousin. Last year for his birthday I made a small crypto portfolio for him to store his coins. He hasn't really bought any by himself, but I am going gift him some again this year for his birthday. Among my friends it's a bit different, I would say that 60-70% own a few bitcoins but aren't really using them for purchases. Because I kept talking so much about cryptos they all wanted to get invested as long term investment that might pay off in a few years. Only one of my friends trades still in CSGO skins and uses bitcoin for that.