Because too many people are doing nothing to promote Bitcoin to other people. We will not see a massive increase in the price from current Bitcoin hoarders, because most of them have already bought their share of the coins. I buy much smaller amounts on a monthly basis now, than what I did when I entered the scene many years ago.
Some people buy and sell during normal trading, but it is not new fiat money coming into the pool, only old money being circulated. What are you waiting for, get out there and promote Bitcoin to new people. ^smile^
New investors will enter bitcoin when they see developments in the currency.
Also there hasn't been any big developments in bitcoin after the Bitfinex hack.
Exactly, we need investors to bring up the price of bitcoins. Promoting bitcoins to more and more people would mean the more purchase of bitcoins and hence the value of bitcoins will increase. And yes if we are able to attract some big companies like suppose amazon starts accepting BTC then there would be a huge spike in the price of bitcoins.