Ethereum absolutely! In 2017, we observed huge growth in ethereum, but is that enough? NO!
In 2018, we'll see a sharp price rally from ethereum once again. The potential is really big in the ethereum platform. Once whales decide to pump it, getting $150 billion market cap will be easy.
I highly believe ethereum will surely do well this year 2018. the dollar value of btc to eth is just too wide in my point of view and with btc scaleability issue and fees eth should be the next option for most people in 2018