In every century, people thought the Lord was coming back to judge the world soon, including Jesus’ disciples in the 1st century. Followers in every generation have concluded that the evil they saw happen all around them must be a sign. However, each time period had its own evils. In various native cultures, human sacrifice was the evil of the day. Of course we can say of our own generation that evil seems to outweigh the good. Think of the 20th century with so little respect for human life before and aftter birth. Consider the great wars, the Holocaust, the brutal bombings of Hiroshima and Nagasaki (whether “necessary” or not). Then consider the eruption of conflict all around the world especially in the MId-East. What about the centuries when one culture tried to devour another through religious persecution? It’s still happening today.
As mentioned above, Jesus said that only the Father knows the time of the end,
Mk 13:32 - “32” But concerning that day or that hour, no one knows, not even the angels in heaven, nor the Son, but only the Father."
Since Jesus is God, as God He, of course, knows the times and the end of time. In His flesh as a human being, He “who, though he was in the form of God, did not count equality with God a thing to be grasped,” (Phil. 2,6).
As for noticing signs (watching the “fig tree”), I think it means to take note of how the world seems to be in preparation for one-world government, which would open the way for the Antichrist. Not everybody believes that the Antichrist is a person, but the bible seems to point to this possibility.
From Wikipedia:
The term or title antichrist, in Christian theology, is a leader who fulfills Biblical prophecies concerning an adversary of Christ, while resembling him in a deceptive manner. The antichrist will seemingly provide for the needs of the people but deny them ultimate salvation.
The term “antichrist” appears five times in 1 John and 2 John of the New Testament — once in plural form and four times in the singular.[1] The Apostle Paul’s Second Epistle to the Thessalonians, in particular the 2nd chapter, summarizes the nature, work, coming, and revelation of the “Man of Sin” - a passage often regarded as referring to same person as the antichrist of 1 and 2 John.