E-Mail alias vs new E-Mail

Hello,

I started to care about my privacy and was wondering if It is worth using E-Mail alias over just creating an new Account for junk.

I am using proton mail for free for important things. But I also need an google account for youtube (channel subs, saved videos, etc.). I could now buy protonmail plus and use alias for google account or just create an fake google mail.

Same goes to for other E-Mail use cases for example for …

account alias care channel e-mail etc free google google account hello important mail privacy proton proton mail protonmail things videos youtube