Throughout the Corinthian letters Paul is ever conscious of who is speaking to whom. He uses pronouns correctly and thoughtfully. I call your attention to how he differentiates between "our preaching" and "your faith".
NIV 1 Cor 15:
12But if it is preached that Christ has been raised from the dead, how
can some of you say that there is no resurrection of the dead? 13If
there is no resurrection of the dead, then not even Christ has been
raised. 14And if Christ has not been raised, our preaching is
useless and so is your faith. 15More than that, we are then found to
be false witnesses about God, for we have testified about God that he
raised Christ from the dead. But he did not raise him if in fact the
dead are not raised. 16For if the dead are not raised, then Christ has
not been raised either. 17And if Christ has not been raised, your
faith is futile; you are still in your sins. 18Then those also who
have fallen asleep in Christ are lost. 19If only for this life we have
hope in Christ, we are of all people most to be pitied.
He goes on to say "we are found false witnesses" and "your faith is futile...".
So he does distinguish. However, here he has pointed out that there not being a resurrection creates problems for all, apostle or lay person. So "we" should, I believe be taken inclusively rather than just the apostles.
However, it should be noted that the apostles in particular suffer for Christ so it makes it especially true for them.