Threas about safety will always be important and welcome to alert people. Well, I think most people still use Windows, so back up on cold hardwares and keep your operating system running with all the correct updates and protections as well. Well remembered by you in taking care of downloads and access to suspicious links and software. For exchanges, send only what you will trade or invest. Exchange is not wallet and no matter the credibility and situation of it. If you do not have the private key, the coins and tokens are not yours.