If you have 10000$. It's better to buy ethereum. 2018 is the year of ethereum

Buying bitcoin next year wont give you alot of profit. It might increase in value but not twice its base.
Best of luck
How sure are you that next year is the year for ethereum? No one can tell if what will happen on the prices of the crypto currency. It will really depend on the demand that the coin will have. Bitcoin's price will continue to rise on the next years and I don't think that Ethereum will be able to go over it's rate in the next years.
wow, throwing a advice/suggestion to invest in a ETH without zero evidence which could lead to it? bro wake up, do you even know how ETH works? ETH has no clue what to do with scalability, this coin will die if they wont fix scalability which is such a crucial part. Bro if you really want to invest into something do a massive research about it check if you believe in this project and so on, never take advice from random people who gives you 0 arguments or information about it, what i can see at the moment in ETH is that they have huge problem with scalability so that usually leads to bad NEWS...