about 3 months, there has been a lot of fluctuation causing the price of ETH to drop dramatically. At this time Should hold ETH ? Can ETH price increase again 1k3$ again in late 2018 ? 
I believe so. The ETH has a future unlike a bunch of obscure tokens. Maybe not so fast, but the price will rise. Especially soon to be hardforks ETH. Is still unknown the exact number of block hardforks and a complete list of changes that need to be entered into the record of Constantinople. The changes should be part of the second group of project updates, which were announced in autumn 2017. All suggestions and discussions are available on the official github Ethereum