One thing that bitcoin has always taught us is to maintain privacy and security at the same time, many will want to acquire bitcoin or trade it and depend on centralized exchange for anything they have to do at the expense of their personal information being released to a third party platform, today we can not afford to give our personal details even when acquiring products like hardware wallet from a company any longer because of the risk to what has been happening from those that earlier did the same thing, the moment we can maintain our privacy, we are mostly prevented.

Haha bro, you know more than these idiots. Datavault sold their shares for more than 1,300 BTC and received those bitcoins off-chain on a centralized exchange that I am sure you and I have never heard of. They were able to sell 400 of them back to the same buyers by sending them back to the same account on the CEX and getting cash, but the remaining bitcoins are now not there.

Datavault failed to recover them, so this news has already been discussed in another thread, but now I was reading your post, and I thought there was no better place than this to back up what you just said.

Since they made the payment off-chain, there is no transparency, and the owner doesn't even hold the keys because the funds sit on centralized exchanges that refuse to give them back now.

Actually transparency is one future about bitcoin that’s clear, but I want to point this also that before trusting any bitcoin services with your funds, you need to be careful and understand how it work even if they are transparent enough. Learn to know what risk are involved, and what protection are available if something eventually goes wrong. You should never assume that your funds are safe because a company looks reputable enough to or claim to be secure. The less you can independently verify things, the more cautious you should be. One thing I learnt about bitcoin is that the reducing the need to trust third parties can be important, but even the self custody requires proper security because losing your private keys or exposing them can lead to loss of bitcoin forever.

When people are reminded to be careful in public spaces, the message is to be cautious about activities that make it easy for others to discover a user’s Bitcoin address. In this regard, there’s a reminder not to use the same address too frequently. All of this is emphasized to prevent others from easily finding out the address.
Security depends on how we protect and use our addresses. Even if an address is secure, there have indeed been cases of Bitcoin theft carried out by criminals. Additionally, the reminder to be cautious of phishing links is intended solely to thwart the initial attempts of these criminals.

No harm is using multiple addresses or generate a new address per every receiving event.

But even more than that we have to be able to secure our devices properly. One single mistakenly downloaded malware will lead to the entire system getting into the hands of hackers and we will lose the coins.

Today so many exchanges and casinos are the targets of hacking, one needs to be careful not to store coins on them, change passwords and set up 2FA and leave no stone upturned to secure them.

Yes, both can be true. Although we are not able to find all zero days even after doing a proper verification we cannot say just because there was a bug the verification was done poorly. However, it also demonstrates the difference between "trustless" as in not relying on a third party but trusting the actual software implementation. Bisq can still apply the same principles, but obviously the code itself has risks.