post apocalyptic ww3 - what will you sell to make money or other goods? (WW3 update)

Good day welcome, and Hi guys

Right first off I'm not 100% positive this will happen but I do know we live in a scary world that is very sensitive to geopolitics, finance, eduction, USA lol, environment, and the idiot elites who seem to be intent on starting something to further whatever sick plan they have for the rest of us.

So I was thinking what would i sell to buy other foods/equipment money etc post apocalyptic type situation?

Well I thought about this for a long time the answer I feel is very simple.

People will need to drink water, right, clean water, so this got me thinking further. Only 2 weeks ago I bought for my family life straw family which filters 17,000 liters of water! Now I'm guessing others won't think of buying this? If for instance the water supply gets cut off bottled water will soon go, right! So I paid £95 for this family life straw so I bought another 1 so I could sell 17,000 liters to the public in exchange for anything else I may want.

So for only £95 I got something I can make a lot of money off and supply my family with hopefully any goods we may need by selling clean water! Lol

I think this is a good little plan, what would you sell?

Cheers guys

Philip