Build that which you and your family will need to weather the coming storm
The storm is the revolution in the mode of production, which tend to produce "apocalyptic" effects (due to the disharmony between the Mode of production and the Relations of production )
Your Ark might be a business, a technology, an organization, a network
There should be many different Arks which ought to all be able to help others out
A fleet of Arks, if you will
if we don't build the ark, many will perish in The flood
The Ark is something which allows people to gather together in common interest, preservation in the face of existential danger