Some poorer translations of the bible say faith "in" Jesus Christ but a look at the Greek shows it literally means out of "the faith OF Jesus Christ", not our faith.
Because of the faith "OF JESUS", not yours or mine, the promise will come to ALL men as they "believe". ALL of us have...
"...sinned and fallen short of the glory of God" and "the wages of sin is death" and "it is appointed unto man once to die" (Romans 3:23; 6:23a; Hebrews 9:27)
So if we all die, what is the promise?
"...the free gift of God is eternal life in Christ Jesus our Lord" (Romans 6:23b)
And when will ALL believe the promise?
Only a few of us believe in this life but the bible says that...
"...at the name of Jesus EVERY KNEE WILL BOW, of those who are in heaven and on earth and under the earth, and that EVERY TONGUE WILL CONFESS that Jesus Christ is Lord..." (Philippians 2:10-11)
So to summarize, because of the faith "OF Jesus", ALL sinners will eventually believe and be given eternal life as God's free gift...
"...as in Adam ALL die, so also in Christ ALL will be made alive...that God may be all in ALL" (1 Corinthians 15:22-28)
The same ALL who die are the ALL who will be made alive.