What Should I Do If a Lucky Carp Suddenly Takes a Liking to Me?

What happens when an utterly ordinary passerby A suddenly catches the eye of a heaven-sent lucky carp who brings wealth?

After living an ordinary life for over twenty years, one day a fish tells me I’ll have more money than I can ever spend.

So what do you want to do?

Eat until I’m full, sleep until I’m rested, then count money until my hands cramp?

(This writing is bad and the logic is dead, so here’s a warning first.)

(It might also have no romance, though I might suddenly introduce a male lead as I write.)