I think it's a lot of big hacking. In fact, these incidents cause problems. However, many small hacks are scams, they are accepted by the property owners. But this kind of hacking does not care about the human side. Adapts to humanity. Everyone wonders why most property owners have had their Twitter accounts hacked. Twitter management did not take any action. I have not heard any such news. This is what happened in bitcoin. If it was a bank account, he could not do any scam. Bitcoin address is possible. So blockchain wallets that collect user information, it would be better to follow this rule.