It is a valuable lesson for all of us to back up everything related to Bitcoin wallets. Many people have experienced losses like the two people above and this should be a concern for us to be more careful. And don't underestimate what you see because it may become big without us realizing it.

But if they lose in the early years of Bitcoin's release, it might be understandable because no one knows how Bitcoin will travel in the future. People tend to underestimate Bitcoin and think it is a new toy they can play with. But when they see nothing changes drastically, they forget about Bitcoin.

But when the price of Bitcoin can increase drastically, they are even willing to do anything to get their Bitcoin. But it's already past. They can't do anything and lose their Bitcoins. We must save Bitcoin by backing it up and storing it in a place we only know.