Between ripple and ethereum, I am prefer choosing ethereum, because with smart contract many token using ethereum network and that make demand on ethereum will increasing
Agree. Ethereum will always have a greater level of demand than Ripple itself. The vast number of tokens created on the Ethereum network, shows that there's huge interest from individuals to businesses alike in the mainstream world. In contrast, Ripple (or the XRP token) has no real uses, except to serve as a payment routing layer for banks. Since it's highly centralized, the fate of Ripple's survival in the mainstream world, depends on its company's success and the number of banks using the ledger.
On the other hand, Ethereum's fate depends on the people using and backing it as a decentralized cryptocurrency. It's flexibility, and extended functionality, will bring lots of demand over time. Therefore, I believe that most people would prefer to deal in a decentralized system like Ethereum, rather than use a centralized system like Ripple which is subject to the same failures as banks. Just my thoughts
