There isnt much that happened this year, I believe 2017 was the most challenging year for Bitcoin. Just check it out there were FUDs, there were lots of people and medias speaking against it trying to take it down, and there were also lots of forks.
So last year was very challenging, but still after all that the price still got back to a higher rate. Everything I have seen this year is less than all that happened last year, so best thing is to keep calm. Even the price rate of $7000/$8000 is really good.