Question:

 How many gold coins can a leprechaun throw in an empty pot?

Answer:

¡ʎʇdɯǝ ɹǝƃuol ou s’ʇᴉ ‘ʇɐɥʇ ɹǝʇɟ∀ ˙ǝuO

Citations:

https://www.upsidedowntext.com/

https://www.countryliving.com/life/entertainment/a38903994/st-patricks-day-trivia/

https://www.imom.com/st-patricks-day-riddles/