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.
Sorry, but why can this POS system make the price of ethereum that high? I can only see one reason like, because of this POS system, more people wiould like to hold this altcoin making the price to rise. But if that's so, it should be happening now.
Let me chime in here.
The price will really at the end of the day be dictated by Demand and Supply.
1.With the release of Proof of Stake - we are limiting the total coin pool inflation to only x% (likely single digits) per year.
2.Adoption. Currently, the ETH Enterprise Alliance features very big perspective players - but they're not going all in for one reason, right now, the operating cost is not the most sustainable due to the high fees miners (needed to run the network) have to pay for electricity and the proportional compensation that they then have to get from the network. Releasing PoS, we eliminate the need for mining, making the system: A. Inexpensive to operate, B. Improved operational capacity (through new innovative tech advance over the current consensus algorithm.) This means, we will have several elements at play here: i. Adoption, ii. Speculative Agitation, iii. Resulting Market Interest.
So, TLDR: Limited Supply (Lower), Far more Demand (Higher). What happens when Demand overtakes Supply? That I'll let you answer for yourself.