First what is a Rapture ? Rapture is one of the beliefs of some Christians that Jesus Christ will come back to earth and take to heaven those who are true believers before what they call the Great tribulation. What is the great tribulation ? It is a future final persecution of Christians. But you may say "I thought the Christians will be taken away ? good question, but this could answer that. Are all Christians the same ? Some are really practicing Christians but some are just by name. So here is the possibility the true will be caught up in the Rapture and those in name only will be left behind.
Those left behind may wake up and really believe that the Christian faith is really true and become true Christians. Now you may ask is the Rapture in the Bible ? The most common verses used are 1 Thessalonians 4:16 ,17 It says:
For the Lord Himself will descend from heaven with a shout with the voice of an archangel, and with the trumpet of God. And the dead in Christ will rise first.
Then we who are alive in remain shall be caught up together with them in the clouds to meet the Lord in the air. And thus we shall always be with the Lord.
I have met fellow Christians who do not believe in the Rapture and there may not be a Rapture as some imagine it to be but the real question is " Do we really believe in Jesus ?" You may say what is belief in Jesus got to do with the Rapture ? Well there are some who doubt Jesus is true, and some who thinks there is no Rapture. The occurence of Rapture maybe another chance for others to believe.By the way recently we are puzzled by the disappearance of Malaysian Airlines flight 370, could an event like a Rapture happen too where Christians will disappear ?
Personally I believe there will be a Rapture, but others may want to wait to see if it will happen. But again the important question is do we believe in Jesus ? Maybe for others they may want to see more proofs, like the Rapture. But i would say believe in Jesus and obey and the rapture will take care of itself.