Last year news of a new partnership however small, or new software or wallet upgrades, or a hard fork, airdrop, the possibility of an exchange listing, or even a shill from a crypto pundit, would have a major effect on the price of a cryptocurrency. Daily pumps of altcoins were commonplace and the ecosystem was an exciting one to be in.
2018 however seems to have been the complete opposite with bears smashing the markets despite positive news coming from several directions. This week has been a prime example with a number of altcoins getting some good news but seeing no positive effects on prices. Those that do get a pump usually get dumped the following day or sooner anyway, the momentum is just not lasting.