Again this is large topic, some of which has been discussed elsewhere on this site. The basic question I want to discuss is the identification of the 'someone like a son of man" in Daniel 7. As we all know Christians understood the figure to be the Messiah (Christ), so the question posed is did the author intend it to be a singular personage or a collective symbol of the holy of Israel as Jews typically read it? Or how about the unexpected idea that the "someone like a son of man" was the very same character as the "ancient of days" in another role?
The catalyst for this discussion is the alternate reading of Dan 7:13 found in the OG (Old Greek) LXX Papyrus 967. (andCodex Chisianus MS 88) Quoting an article by Bogdan G. Bucur: (3) The Son of Man and the Ancient of Days Observations on the Early Christian Reception of Daniel 7 | Bogdan G Bucur - Academia.edu
There is a notable dierence between two extant Greek versions of Dan7:13. While Theodotion, faithful to the Aramaic text, speaks of “one likea son of man” being presented to the Ancient of Days (ὡς υἱὸς ἀνθρώπουἐρχόμενος ἦν καὶ ἕως τοῦ παλαιοῦ τῶν ἡμερῶν ἔφθασεν), the so-calledOld Greek (hereafter OG) depicts “one like a son of man” traveling, ingodlike fashion, “upon” the clouds of heaven (Ps 103/104:1; Isa 19:1),and approaching “like the Ancient of Days” (ὡς υἱὸς ἀνθρώπου ἤρχετοκαὶ ὡς παλαιὸς ἡμερῶν παρῆν).