It is really hard to say as it depends on bitcoin price at that moment
... and the place where you live.
from what I have heared you can make a living for 100$ in venezuela.
But in Texas that amount brings you nowhere.
in venezuela some trivial things may cost more than $100, like bubble gum or rice and stuff like that.
they have hyperinflation and not enough supply, so unless you are really rich or from the government, you'll make a living only if your concept of living doesn't evolve things like have enough food to survive etc