Turnips, but unless you time travel, you'll have to wait til Sunday unless you've bought some.
The only other way for fast bells is the island. I prefer turnips just because I don't have to spend 15+ minutes everyday doing the same thing over and over.
Have you done tt with turnip sales? If so what's your method?
Nope, I don't time travel. I just buy them on Sunday and check the trade board every couple of hours through the week to see if there's a topic about selling turnips for greater than 300+ that doesn't have an insane amount of people in it yet.
While you bask in my glory, please try not to make me angry by writing words that don't exist in dictionaries.