Jeff Foust reported on twitter that Jonathan Hofeller, SpaceX VP of Commercial Sales, said that SpaceX would try to set a new record for launches in 2019. This would mean having 22 or more launches because SpaceX had 21 successful missions in 2018. The statement was made at a launch panel discussion at the 2019 Smallsat Symposium.
Online speculation is that additional launches will be SpaceX launching their own Starlink Satellites and some unspecified military or spy satellites.
Jonathan Hofeller of SpaceX on a #smallsat2019 launch panel: this year we're going to try and break last year's record of 21 launches.— Jeff Foust (@jeff_foust) February 6, 2019