Sometimes, creating too many emails can make you get confused when you don't have access to the book that you wrote the passwords if you are away from home. We are in the same shoes, I have a specific email for gambling and use that email to register in any casino that I want to gamble in. I have a separate email for exchange and so on. The important thing is that I only keep funds that I can afford to lose with a third party.
I see no point creating multiple emails when you can make use of two probably the other must not be exposed, in terms of written passwords you can still save them although someone insisted I make use of password manager app so I don’t have to bother about having password issue yet I still don’t trust the process. The easy solution is having few emails so you can be able to differentiate them when encountering any difficulties, memorizing this can be difficult no doubt definitely people still prefer google manager.