To understand these few verses, read them in context; read all of Matthew 24 and 25 together as a single, complete discourse. Recognize the central themes of the discourse: "So if they say to you, ‘He is in the desert,’ do not go out there; if they say, ‘He is in the inner rooms,’ do not believe it", "But of that day and hour no one knows, neither the angels of heaven, nor the Son, but the Father alone", "Therefore, stay awake, for you know neither the day nor the hour", the final judgement, and salvation or damnation.
To claim a few verses in the middle of this discourse were a prophecy of a "faithful and discrete slave" showing up nineteen centuries later is shoddy scholarship. Rather, the point is that you must choose whether to be a faithful servant or a wicked, dishonest servant, that you make the choice to be a sheep on the right or a goat on the left, and that by your behavior you are choosing eternal life or eternal punishment.
Self-serving false prophets who use scripture to justify coveting a jeweled golden cup have chosen...poorly.