What does 1 Corinthians 15:30 mean?

Paul is asking a series of questions to further make the case that Christians will be resurrected from the dead when the time is right. He asked what seems to be a rhetorical question in the previous verse, about a group that practiced baptism for the dead. This is not a Christian practice, so Paul asked what the point of that was for them if they did not also believe in the resurrection of the dead.

Now he asks why he and his fellow preachers of the gospel of Jesus live in constant danger if there is no resurrection from the dead. What danger? Paul will mention some of it in the following verses, but he was regularly and continually persecuted both by the religious Jews and the Romans. He asks why he would continue to do this if the gospel was false (1 Corinthians 15:14–19) or if he would not one day be resurrected as Christ was. What was all his sacrifice for if life ends, once and for all, at death (2 Corinthians 11:24–28)?