Hmm I’m concerned that you’re frequently loading your master password into your presumably unencrypted clipboard on your computer, where a virus of some sort could snatch it. This may be crazy talk, but who knows man.
I use LastPass as well, but I memorized my master password, it’s only about 25 or so characters, so fairly easy if you toss a few uncommon words in there. Maybe that’s a bit overzealous, but eh, it works and I can type it quickly. Don’t forget 2fa as well. I usually only have that turned on for my linchpin sites, like LastPass and Gmail.
Of course this is just my experience/opinion 