When I saw the topic, the first thing that came to my mind was, this thread is own by newbie. And as I checked it is. Op most of the things you made mentioned are not new in the forum. We have discussed those things in many time. Real investors of bitcoin would not keep their coins in an exchange for long term but to sell within a short period of time or they can keep it for trading purpose.
Non custodial wallets has no email so there is no way someone will receive email from the wallet. It is only centralized exchanges that have email. And centralized exchanges would not send you email and if they want to discuss with it is through your account in the app. You can see a pop up to update and auto update of the app from the phone.
Well you are right that everything that is listed are not new to us. But let’s just think that this post will be benefited by the newbies that are constantly coming in, and for that this is still helpful for them and for the future bitcoin investors.
There are still topics that no matter how repeatedly it is discussed, there are still good reasons to make it as a constant reminder to be always cautious with our investment, crypto or not.