Building a fuel storage tank may be a sensible thing to do because there are many kinds of situations in which it could be needed short of a total collapse of civilization.
I'm not a prepper. It's much less of a thing here (Finland), possibly because we don't have the kind of extreme weather events relatively common in Texas and much of the US Midwest.
Howdy today sir markkujantunen! I hope Finland never has need of prepping. Most preppers here believe that a total collapse of society is coming either from nuclear or EMP attacks or triggered by a financial collapse.
I know the business of building lavish bunkers and hardened homes and shelters is exploding in growth all over the States. Hopefully we'll never need them but who knows. Thanks so much for your great comments!