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 think most of us who are convinced of the great potential that ethereum still has are expecting to see a four-digit figure in the price of ether soon, but the market seems to be still quite hesitant these days so maybe we should wait until the end of summer to see that mark fall again. In the meantime, it is worthwhile to keep accumulating ethers in our wallets, as few altcoins have earned the trust and credibility that Vitalik has given to ethereum.