That's not possible when you invest in Bitcoin, quite a lot of altcoins plunge and go extinct after one invests in them, but if you buy Bitcoin there's no way your funds can 'disappear', it might only plunge temporarily and you don't lose until you sell, thus as long as you are ready to hodl for the long term, it is definitely going to appreciate in price again, and that's because Bitcoin has an actual utility which makes it impossible for it to go extinct.