What does the Bible say about what people would be like in the end of days?

One of the longest passages about what people would be like like in the last days is 2 Timothy 3:1-9:

But understand this, that in the last days there will come times of difficulty. For people will be lovers of self, lovers of money, proud, arrogant, abusive, disobedient to their parents, ungrateful, unholy, heartless, unappeasable, slanderous, without self-control, brutal, not loving good, treacherous, reckless, swollen with conceit, lovers of pleasure rather than lovers of God, having the appearance of godliness, but denying its power. Avoid such people. For among them are those who creep into households and capture weak women, burdened with sins and led astray by various passions, always learning and never able to arrive at a knowledge of the truth. Just as Jannes and Jambres opposed Moses, so these men also oppose the truth, men corrupted in mind and disqualified regarding the faith. But they will not get very far, for their folly will be plain to all, as was that of those two men. [2 Tim 3:1-9]

This passage is not about all people, though. Worryingly, it’s about what some people would be like who are members of the church (see the context from 2 Timothy 2:14ff.). Paul’s warning to Timothy is to help him (and those he teaches) to not be like that.

The New Testament has more general things to say about unbelievers; e.g.:

[unbelievers are] living in sensuality, [and are involved with] passions, drunkenness, orgies, drinking parties, and lawless idolatry. [1 Peter 4:3]

These aren’t specifically “end time” characteristics. They are simply true of all time and it is out of this that God is calling people so that they might live ‘no longer for human passions but for the will of God’ (1 Peter 4:2).

Jesus also has this to say about what people would be like before his return:

But concerning that day and hour no one knows, not even the angels of heaven, nor the Son, but the Father only. {37} For as were the days of Noah, so will be the coming of the Son of Man. {38} For as in those days before the flood they were eating and drinking, marrying and giving in marriage, until the day when Noah entered the ark, {39} and they were unaware until the flood came and swept them all away, so will be the coming of the Son of Man. [Mat. 24:36-39]

Notice how nothing particularly untoward is going on here. Rather, people are simply going about their everyday lives without any regard for God. Jesus’ main point it that his return will be sudden and unexpected, unless you are watching for it (v42): therefore, we need to be ready, always doing God’s will (v44ff.).