I heard about something that happened some time ago where a man won a huge some of money in gambling and he decided to save the money in a particular bank the money was there and later on the bank was closed down and he had to go through a lot of procedures to get his own money he was paid half of the money with promise of completing the payment soon, this won't happen if you saved with Bitcoin.
I also heard of a man who was into real estate investment and because of a new policy established by their government he lost a lot of money and that was how he went bankrupt, this won't happen if you invest with Bitcoin.
There was a story where a banker sends customers details to scammers and they have succeeded in scamming a lot of people, this won't happen if you save with Bitcoin.
It is worthy to note that Bitcoin operates on a decentralized network, This means no central authority or government controls it, Bitcoin gives full financial security and you have privacy you alone controls your money, when you invest in Bitcoin you won't have to worry about government policy, in the time of war or conflict your investment is secured.
As you say it really happens in many places that many people face financial loss due to changes in banking system, government policy or any other. Meanwhile, since bitcoin is decentralized, there is no possibility of financial loss. However, no investment is completely risk free. It fluctuates in value. Apart from this, measures should be taken on one's own responsibility to protect the personal wallet from cyber crime and hacking. With proper knowledge, safe storage and long-term planning, it will become a powerful asset for the future.
While OP gave examples when person lost money by thrusting bank, there are much more examples when people lost money to crypto scams and hacks.
It is important to always keep in mind that in crypto you are your own bank. So if you make mistake and compromise wallet/ private keys it can cost you all your. funds and there will be no safeguards or government to return your funds to you.