The total supply of PATH tokens is 1 Quadrillion and not 15. The reason behind having a higher supply is more of a psychological feature, people like to see more coins in their wallet by paying as little as they can. Therefore, we not only aim to target large scale investors, but also small investors who can receive considerable number of tokens for small amount and also see growth in the number of tokens in their wallets everyday, because of tokenomics (3% of each transaction distributed amongst holders).