"everyone believing" =~ "Whoever believes" = ALL believers in Jesus the Christ, the Messiah, the God-Man

1 John 5 : 1-11 (NASB)...one of John's letter to believers... On Overcoming the World...extracts and comments

 Whoever believes that Jesus is the Christ is born (again from above) of God, and
 whoever loves the Father loves the child born (ultimate God-Man) of Him.
  By this we know that we love the children of God, (believers)
  when we love God and observe His commandments.
 For this is the love of God, that we keep His commandments;
 and His commandments are not burdensome.
For whatever ( Whoever)  is born (again from above) of God overcomes the world;
and this is the victory that has overcome the world—our faith.....
Who is the one who overcomes the world, but he who believes that Jesus is the Son of (ultimate Man) God?
... And the testimony is this,
that God has given us eternal life,
and this life is in His Son.
He who has the Son has the life; (all believers)
he who does not have the Son of God does not have the life.

The ..."144,000"...READ: in context Revelation 7 AND Revelation 14

...."sealed the bond-servants of our God" ...those saved during the 7 years of Tribulation...
Israel's messengers that Messiah had come...The Christ-followers' Second Coming

Revelation 7:4
[ The 144,000 ] And I heard the number of those who were sealed,
one hundred and forty-four thousand sealed from every tribe of the SONS of ISRAEL: [12,000 per tribe X 12 tribes] = [ The 144,000 ]

Revelation 14:1
[ The Lamb (Jesus) and the 144,000 Jewish messengers on Mount Zion ]
Then I looked, and behold, the Lamb was standing on Mount Zion, and with Him
the one hundred and forty-four thousand,
having His name and the name of His Father written on their foreheads.(believers)

Revelation 7....
Who: every tribe of the SONS of ISRAEL
TIme frame: during the 7 years of Tribulation
Why: Jewish "Billy Grahams" and missionaries declaring: Messiah has come
Event: usher in Jesus' Second Coming and the 1000 years reign of the KING of KINGS on His throne in Jerusalem