Jesus gives seven churches in Asia some relevant instruction for their time and place, but it is also relevant to us as well. The churches also represent different time periods of the Christian era. Jesus loves His church and gives them special instructions to help them with the trials that they will be encountering. Read what He tells the church of Smyrna.
Fear none of those things which thou shalt suffer: behold, the devil shall cast [some] of you into prison, that ye may be tried; and ye shall have tribulation ten days: be thou faithful unto death, and I will give thee a crown of life. Revelation 2:10
Usually when someone says, “Don’t be afraid,” we take it to mean that they are going to save us from death. While Jesus is telling His church not to fear, He is not promising them they won’t die. He is just telling them don’t be afraid to die, because I will still give you eternal life. As Christians there are things we should fear a lot more than death, like sin and compromising with the world. Christ promises to save us from evil, and one of the ways He may do that is to let us die and rest until He returns. Those who are asleep in Jesus are eternally beyond the annoyances of sin and evil! And yes, Jesus promises us a crown of life if we are faithful. Not just faithful as long as it does not cramp our style. Not just faithful as long as are lives are saved, but faithful until death. Is that not how faithful Jesus was to us?
Jesus is not promises us a bed of roses. He is not saying we will never be cast into prison, or die. He is just saying, Hey don’t worry about it. I will still give you eternal life.