If the NEO team is silent but still working, you don't have to worry much, they have released a new Roadmap. The project takes time to develop, crashing after the hype in the end of 2017 I think is necessary to make projects more mature and more sustainable. I will still buy and keep NEO for longterm goal.
NEO prices are still moving, but fluctuations look calm so the NEO coin is not attractive to speculators and is reluctant to invest in the NEO. The price of coins will quickly rise if attacked by large capital speculators.
This is evidenced by the movement of bitcoin prices, where speculators buy bitcoin, prices move up. This happens naturally where the need is greater than the stock price to rise.