Now ETH price around 500$.Will ETH price reach 1000$ in 2018 Jan 
Where are you come from? The average price for each ethereum token in this time was around $440 that means there is a lot of gap with your price. may be you are seeing it on the speculation thread. I will believe at the end of the 2018 each ethereum will be equal with the bitcoin cash price due to the POS system.
hit $1,000 by first quarter of 2018..and for sure lots of users are in my back saying
this would happen.this year was a bad time for eth bitcoin dominated the whole market
system.so hopefully next yesr will change and favored alts