Normal cryptocurrency is a code-based resource created to be employed as a medium of exchange. New units may be created by mining. Everyone can get involved if they've access to a computer. Mining uses a large amount of hours and electricity, however. A powerful machine is also needed, to do this profitably. On the other hand, Ripple is a centralised asset, which cannot be mined. A finite supply of coins were made by the company and this amount will never be added to.