Hey, I am on your side in this argument but ... I would say the verse addresses our current status and not our future status necessarily.
I like these verses better... there are a lot more
John 6:39 And this is the will of him who sent me, that I should lose nothing of all that he has given me, but raise it up on the last day.
John 10:29 My Father, who has given them to me [Christ], is greater than all, and no one is able to snatch them out of the Father's hand. [a true believer cannot renounce his faith]
Romans 8:31 What then shall we say to these things? If God is for us, who can be against us? … 38 For I am sure that neither death nor life, nor angels nor rulers, nor things present nor things to come, nor powers, 39 nor height nor depth, nor anything else in all creation, will be able to separate us from the love of God in Christ Jesus our Lord.