“holy ones.” These are the people who obey God and live holy lives. See commentary on Daniel 7:18.
“prevailed.” Daniel 7:21 (also Dan. 7:25) foretells what is also prophetically spoken in Revelation 13:7, that during the last half of the seven-year Tribulation, when the Antichrist is in full power, he will wage war against God’s people and overcome them (cp. Rev. 13:7, 10; 14:12-13).