Bitcoin prices have never been so low this year. Prices were down to 5,826.41$ (Jun 24 2018 16:04:00 UTC). Many advisers say that at the end of the year it will hit 30,000$. The market is seeing more than the fall from the price rise. Imagine when the speculation will end?
Who said that? Those "advisers" must be a mega permabull to make that call. No, we won't make new ATH this year. Stop expecting unrealistic target and accept that we're in a downtrend right now. This might last a few years just like 2013. The speculation won't end anytime soon. Bitcoin and the whole crypto market is a perfect tool for speculation because nobody knows how these virtual coins should worth.I'm pretty sure that the price will shoot up again this fourth quarter but i don't think it will hit around 30k usd. Then again if that should happen, that's good for everyone.
That won't be good for people buying at the top 
I imagine there would be an immediate correction and those people buying at the top surely won't be happy.