It's already 2019 and no bullrun happened but the prices of some coins bitcoin are going up and the whole market is getting positive on growth. But there is always a possibility of price declines in the coming days so there is still no assurance if this uptrend will continue in the coming weeks. Some altcoins have scheduled hardforks and mainnets this first quarter of the year and price might go up then dump later.
Many people were hoping that bitcoin will start bull run from 2nd week of January, but it did not happen as bitcoin again felt down and testing the 3500$ area. Although there is no bad news for bitcoins, yet I think it may take a lot of time until we see bitcoin prices really increases like in 2017.