Keeping a three-flower cat may bring you good luck, but it is not absolute. People who believe in geomantic omen believe that the patterns on Sanhua cat have unique energy and can make money into treasure. Besides, cats, as sensitive animals, can indicate spirituality and wisdom. In some religious cultures, cats are also regarded as sacred animals.
But whether it brings good luck or other pleasant effects is based on personal beliefs and cultural background, and there is no scientific basis or clear evidence to support it. Therefore, whether raising a three-flowered cat brings good luck is a matter of personal ideas and beliefs.