While no man knows, we are instructed to watch and understand unfolding events. And we are given powerful prophecy and are charged with seeking to understand it ("Here is wisdom. Let him that hath understanding count the number of the beast").
But the end of all things is at hand: be ye therefore sober, and watch...Rev 3:3
Remember therefore how thou hast received and heard, and hold fast, and repent. If therefore thou shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee.
There is, of course, more than one reason why a Christian shouldn’t ease off of his zeal to live righteously. If a supernatural event does not intervene in the world, one could simply die. Either way the meeting could happen without warning. Better not to have too many embarrassing things to explain (they will be forgiven, but the encounter will not be comfortable).