What is the biggest obstacle that prevents the poor from becoming rich?

The biggest obstacle is that capital indoctrinates the poor with all kinds of moral and ideological restraints, spills dirty water and stigmatizes their struggles, and makes them feel at ease with the status quo.

Space-time warps in the vicinity of extremely massive bodies.

In the face of capital, the "space and time" of human society will also be strangely curved.

When you have money and capital, the social norms and moral laws that ordinary people follow open the door for you to make any changes, and the changes will be in your favor.