Plants are known to provide clean air, food, shelter and many other benefits to humans. But some of them are also believed to bring prosperity and good luck, like the crassula money plant. Many people believe that the name money plant origins from a story where a poor man prayed for money, found a crassula plant, took it home as an omen and made a fortune from selling plants that he grew from its seeds. Others say that its name comes from the fact that this plant’s leaves resemble coins.
Source: http://www.purposeof.com.au/crassula-money-plant-attract-wealth-and-good-luck-to-your-home/