People should not keeping their coin at the exchanges since that place is not a storage for the coins. People can trade and increasing their coin amounts but they should send their profits to their own wallet. Keeping their coins at exchanges is not a good decision, no guarantee the exchanges will online forever. If they can aware this and securing their coin at their own wallet, nothing to worry and they will not make a mistake with their Bitcoin investment. We have many lessons so we should always be careful and learning from others is necessary so we don't have making a mistake like them.
Every experience is new knowledge for us. We can learn from our own experiences, as well as from others. Mistakes that other people make from past events can become lessons and warnings for us. But remember, always make another plan to be more careful. We've also seen people lose access to their Bitcoin wallets. That's a mistake they made themselves. Manage and protect your own Bitcoin.
Learning from your own mistakes is good, but learning from the mistakes that other people made is even better, because then you won't have to go through it yourself to actually learn. When you learn from others, you don't have to learn it the hard way.
For example, when someone is in a financial market like the crypto market, and they do some research and find out that a certain trading method is not good and it can cause losses, so instead of using it themselves and losing some money and learning the hard way, they now already have the knowledge and don't really need to test it out and then find out.
When it comes to Bitcoin and how we can keep ourselves secure financially, like keeping our wallets safe and secure and making sure we don't lose our seed phrases and private keys, it is important that we as newbies gain enough knowledge first before we even get started, because when you don't have knowledge, you might not know the importance of your seed phrase and you might save it in places where you shouldn't.
I have seen people literally taking screenshots of their seed phrases and keeping them in their phone's gallery because they just feel it's a random code that they might need in the future, but they don't understand how important that phrase is if they are actually going to use that wallet and keep funds in it.