Both coins are very promising for profit. However, I prefer ethereum. Bounty hunters mainly work with ERC-20 tokens that are released on the ethereum platform, which is needed to move them. In addition, ethereum itself is a very promising coin. Now it has a relatively low price, but after the successful implementation of the first part of the expected improvements it can quickly soar in price.
A ripple coin is too specific in its field of application and in relation to its centralization. She can not yet compare with ethereum.