I very much enjoy having 9223372000B coins and earning -4997961T coins per minute. Snout brooch and 80 residents that were just hanging out got there quick, but exponential interest is always the correct answer.
Happy to say I managed to beat it first try in about half an hour. Very close to getting trapped but I had a lucky fish shop that brought me back. Unfortunately playing on a work computer so I couldn't take a screenshot. I was very happy with my setup and this game in general.