What does malcolm x mean by "an economic philosophy of black nationalism

The ideology of the Nation of Islam is black nationalism. Encouragement to economic independence and self-reliance are part of the ideas of the movement. It called for black entrepreneurship, black ownership of businesses and venture, mutual assistance, keeping the hard won money in circulation in the black community. It is in this context that we must understand Malcom X´s words.

Explanation:

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.

keeping a cash reserve because cash flow is the the movement of money through a company and if it just sits there, it wont the movement