No one is a future king until they've received their final seal.
All of the 144,000 have their final seal at this point.
Jesus wasn't king yet in 1914, but Revelation shows that the plagues don't start until after the 144,000 are sealed.
The plagues in Revelation are figurative. The war, pestilence and famine are figurative of Jehovah sieging and plaguing the religious institutions and then the corrupt governments. The "blood" shows their bloodguilt. The "hail" is pelting them with truth that exposes the lies. The "stars falling" is the religious leaders falling from their positions and self-made-glory. They're getting exposed and shamed. The plagues include when the governments associated with the UN strip the of their financial assets and dissolve their hierarchies.
These things are happening now. We are in that time now.
Which is why we know Jesus is king now and the 144,000 are all sealed. None of the 144,000 have gone to heaven yet though.