Passage
he who is overcoming shall inherit all things, and I will be to him--a God, and he shall be to me--the son,
he who is overcoming shall inherit all things, and I will be to him--a God, and he shall be to me--the son,
Revelation 21:5 And He who is sitting upon the throne said, `Lo, new I make all things; and He saith to me, `Write, because these words are true and stedfast;'
Revelation 21:6 and He said to me, `It hath been done! I am the Alpha and the Omega, the Beginning and the End; I, to him who is thirsting, will give of the fountain of the water of the life freely;
Revelation 21:7 he who is overcoming shall inherit all things, and I will be to him--a God, and he shall be to me--the son,
Revelation 21:8 and to fearful, and unstedfast, and abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all the liars, their part <FI>is<Fi> in the lake that is burning with fire and brimstone, which is a second death.'
Revelation 21:9 And there came unto me one of the seven messengers, who have the seven vials that are full of the seven last plagues, and he spake with me, saying, `Come, I will shew thee the bride of the Lamb--the wife,'
The verse centers on "all things", "overcoming", "shall", "inherit", "him--a", and "me--the". It is saying that the verse draws attention to "all things" and "overcoming", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 6's "and He said to me It hath..." into verse 8's "and to fearful and unstedfast and abominable...", so "all things" and "overcoming" belong inside that flow. In Revelation context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "all things" and "overcoming" with trust shaped by these words, not by a vague optimism outside the passage.