If you know it will be in the end of the world and/or humanity soon...

It's not about going out and spending everything you have left before leaving this earth.

Speaking for myself and husband, we live paycheck to paycheck and can only afford the basic necessities after the bills and we only have one credit card with less than $100 debt on it. It's a card with only $1,000 limit, even when he had a job that paid twice as much, and we've only come close to the maximum two or three times and that was due to vet bills [ chronic kidney disease ] car repairs and air conditioner repairs. We've always been savers, not spenders and its served us well when he was out of a job for almost two years when we lived on our savings. I don't work due to having to occasionally taking care of my 78 yr old mother when she needs me after her spinal and heart surgeries.

I'm a Christian and believe the Holy Bible in that the world will not end until after the tribulation, Armageddon, and the thousand years of peace with Heaven on earth. Then God will create a new heaven and new earth.
Revelation 21:1
The rapture will occur before the tribulation, and many Christians are preparing their souls like never before because we believe the time is at hand either this month, this year or next year due to all that is happening in the world as foretold in the Bible.
"Be always on the watch, and pray that you may be able to escape all that is about to happen, and that you may be able to stand before the Son of Man."
Luke 21:36

The only things I'm doing differently than before in my day to day life, is praying more, abstaining from an old habitual sin [ 6 months and counting ], and ringing like a bell with my fellow brothers and sisters in Christ to get the word out that the rapture is Very soon and to accept Jesus or be left behind to suffer the tribulation that is about to befall mankind.

ALL that matters is God and living with Him forever in Heaven.

As the Bhagavat Gita says the slayer slays not the slain nor is the slain ever slain by the slayer, you cannot slay the Atma (eternal unborn soul). No matter what time will go on and soul will an emanation of you.

Money will perish and those who spend it and worship it. Why not give it to the poor and come and follow Christ. Because it hasn't entered into the mind of man what God has prepared for those who Love Him.

Matthew 21
21 So Jesus answered and said to them, "Assuredly, I say to you, if you have faith and do not doubt, you will not only do what was done to the fig tree, but also if you say to this mountain, 'Be removed and be cast into the sea,' it will be done.

What would you give for that kind of Power spoken by truth.