What advice is worth passing out to people who have lost their Bitcoin more than once and are on the hedge of giving up?
Maybe before he decided to buy again, why not try to think of the things that went wrong that cause him to lose his bitcoin, because if he's not going to do that, he'll just keep on losing his investment because of his repeated mistakes. Investing in Bitcoin doesn't end in buying it alone, a reputable bitcoin wallet is a must to secure that investment.
Always remember, not your keys, not your coins.