doomsday = a time of trouble that results in destruction, death....etc. you can kid yourself and believe that guns and stored food will protect you, but desperate people do desperate things and if people are starving to death and you have food, well they'll kill for it. Why do people store up things? The motive is selfishness, you can call it wisdom, but it's selfishness. Love your neighbour as yourself, if people come to you and ask for a cup of rice, would you give your last cup when things are tough? The time of trouble that causes us to depend on God and trust Him with our life will test the true believers from those that trust in their own strength. Jesus gave His life as an offering and those that followed Jesus did the same.
Eph_5:2 And walk in love, as Christ also hath loved us, and hath given himself for us an offering and a sacrifice to God for a sweet smelling savour.
Php 1:21 For to me to live is Christ, and to die is gain.
Php 1:22 But if I live in the flesh, this is the fruit of my labour: yet what I shall choose I wot not.
1Ki 17:14-16 For thus saith the LORD God of Israel, The barrel of meal shall not waste, neither shall the cruse of oil fail, until the day that the LORD sendeth rain upon the earth. 15 And she went and did according to the saying of Elijah: and she, and he, and her house, did eat many days. 16 And the barrel of meal wasted not, neither did the cruse of oil fail, according to the word of the LORD, which he spake by Elijah.
1Ki 19:5 And as he lay and slept under a juniper tree, behold, then an angel touched him, and said unto him, Arise and eat.
1Ki 19:6 And he looked, and, behold, there was a cake baken on the coals, and a cruse of water at his head. And he did eat and drink, and laid him down again.
1Ki 19:7 And the angel of the LORD came again the second time, and touched him, and said, Arise and eat; because the journey is too great for thee.
1Ki 19:8 And he arose, and did eat and drink, and went in the strength of that meat forty days and forty nights unto Horeb the mount of God.
The journey is too great for us so we need to trust in God. Try and do it in our power and we will surely fail. Ask yourself what your motives are, and remember Joh_15:13 Greater love hath no man than this, that a man lay down his life for his friends.