I have a different password for each service I use. Each password is 30+ characters long and completely random with letters, numbers and special characters. There’s no way I could remember any of them and they’d be a hell to type out manually. I use KeePass on every device I own and it’s synced over my NAS. So it’s super convenient and no risk for leaks.
Yes. I know a bank where you’re trading fees are lower or even zero, depending on the size of your share portfolio.