The only assumption that could reduce these figure

The only assumption that could reduce these figures is 1 billion doses. It remains to be seen what percentage of the world's population will be infected (timing of a vaccine being the largest variable). It also remains to be seen what percentage of those that do contract the virus, will need treatment.

Will a "miracle treatment" be distributed to all who contract? Or only the most severe? I would expect somewhere in between.

We also need to acknowledge that we currently have, and will for some period of time, significant production constraints.

Each month that it takes to ramp up production, and each month sooner that a vaccine arrives, the window for Leronlimab shrinks.

With that said it's massive potential either way.