I meet loads of people who have collected coins everywhere. They have 20 different types of wallets with a little bit of value. It's due to happen that people will loose their private keys or forget that they even have an account. Over time that value could accumulate pretty big. What will happen to these 'lost' coins? Will these stay on the Blockchain forever, accessible to no one anymore?
It's a loss for those who forgot their wallets and let there coins float. It will only make the supply scars and the price will rise. So to avoid lssing our private keys, we should be serious on this business and keep it in a safe storage like offline wallets.