I'm worried about governments mandating microchip implants/vaccines/identification cards...could these things be the "mark of the beast" from Revelation 13?
Scripture teaches that the events of the seven years of Tribulation, including the requirement of a mark to buy or sell, will come to pass years after the Church has already been removed from the earth (see our teaching on the Rapture). Therefore, we should not expect to be present to witness such developments, which means speculating on current events and trends is likely unhelpful.
Moreover, the mark required during Tribulation is very specific and very different from a "microchip" solution:
Scripture says the mark taken during Tribulation will be the name of a man or 666, the number of his name in Hebrew. The Bible never specifies the way the number of the antichrist will be applied to the body, except to describe it as a "mark". The Greek word for mark is charagma, which means "to sharpen, to engrave; a stamp, impress." This description likely precludes the possibility that the mark will be based on technology like a chip, as many speculate. More likely, the mark will be a simple tattoo or branding on the skin.
Finally, as Pastor Armstrong explained, the worldwide destructive effects of the seal and trumpet judgments will almost certainly render all modern technology (and infrastructure) useless. The Bible says cities will be leveled, mountains and islands gone, and the entire world rocked by immense earthquakes. When we consider how easily basic services can be interrupted today by more modest world disasters, then we can safely assume that the Tribulation judgments will put an end to all technology forever.
Therefore, by the time the mark of the beast is required at the middle of Tribulation, the world will likely exist in a rudimentary state without basic services like electricity, transportation, internet, and the like, and under those circumstances, it's likely that the mark will be something simple and physical. Therefore, Christians should avoid speculating on future events beyond what is given explicitly in the Bible.