I think people are expecting too much and not being real.
They are all comparing prices with 2017 that was realy exceptional for Bitcoin and everyone was expected such enormous growth to continue but the market isn't reacting according to our wishes.
Still there is a whole of half of this year that can bring further growth of Bitcoin but don't expect that the huge price from 2017 will happen so soon again.
You justly noticed that many investors expect rapid growth in 2018 simply because at the end of 2017 bitcoin showed incredible growth (pamp), but that does not mean that this year the market will show incredible growth. This year, the growth in investment has increased significantly compared to the same period in 2017 and everyone who invested at the beginning of the year really wants to record profits.)
You are right because of 2017 price correction most investor of bitcoin expecting a good run this year(2018) but the sad reallity from the start of this year unyil now the price are dramatically in falling down in a few hours the price are decline so high and it almost touch the $6k+ a good opportunity for those people that new in cryptoworld.