“Handle” is slang for nickname and has been around for over 100 years 
Discussion
no one asks for an email handle 🤣 they ask for email address or just say what's your email, dropping the address entirely because we know what the person means. they same will happen with lightning and nostr, given enough time.
npubs are hard to read out over the phone. QR Codes will become even more prevalent, but I feel like there needs to be something else. Something more resistant to human error.
I just think “address” sounds boring and too formal, handle adds flare!