For a high security password, which is needed for your e-mail, your password manager, and your cryptocurrency and more, this method is the absolute best while being the easiest to remember, transcribe, and communicate to others.
Side note, also please use 2-factor authentication for all of these as well 🙂
In this video I do a test using Mechanical Turk to transcribe 360 Passwords using random characters, BIP-39, and Diceware. I calculate which method gives the best entropy per second.
I also run a (non scientific) single memory test for each method.