What’s others opinion?
I think that NOBODY REALLY HAS ANY IDEA what it is, but "Eschatologists", "False Prophets", "Conspiracy theorists", etc. will continue having a "Field day" (like they've had for centuries) pontificating about that of which they know NOTHING.
"Covid Vaccine" is the latest "Mark of the Beast", like the Internet was, and your "Social Security Number" was back in the day.
Personally, I don't give it a second thought. I expect that the Holy Spirit will clue me in when its actually time for concern, IF I'm still alive when the REAL ONE comes along.