I made some suggestions recently on ways to preinvest. There are in fact no good investments right now. Thus I concentrated on reducing debt and having cash reserves in several places and in several forms. Having a large pantry might be the best "investment" you can make. Not because the zombies will attack, but because inflation or unemployment may be coming. I would not even think zombies attacking as impossible.
The following video shows why investment is so difficult. There is little to invest in as the risk gets higher and higher if you chase high returns. The presenter suggests gold. Maybe. But gold was confiscated in 1933, and this could happen again. Most of us are better off with our money in a major bank, ... nuts that won't work either.
In any event this video sums up why I am so nervous about the future.