Do you use a password manager?

[dkbit98]

Interesting new product was just released called Seedkeeper Ring and that can be used as a password manager.
It can also be used for storing encrypted seedphrases.
https://seedkeeper.io/product/ring/

Which Linux distro would you recommend that has highest security possible and do you suggest dual booting or booting through pen drive? I am looking to purchase gaming laptop, and I'd require windows to play games of course but for crypto stuff, I'd prefer Linux.

I don't know, probably Tails OS on USB stick is better option for privacy.
As for standard Linux OS you need to try them to see what fits you better, but for me Fedors is the best and most serious linux OS.