I have been somewhat of a fan of astronomy and cosmology, but I am not trained physicist. So please correct me kindly in case I have stumbled with some terminology.
The causes of big bang are somewhat of a mystery. But I would like to dig a bit more into the details...
What caused or determined the total amount (it's a number) of matter or energy created/released during big bang? As I understand, this total has been constant over the evolution of Universe. So from "where all this amount came from"?
Why not less or even more?
Please note, I am not asking, "where the mass and energy came from" or whether it existed or was created. I am interested only - what caused the amount, or to which other important properties or laws the amount is related to?
The amount is a number. We often explain numbers in physics and cosmology.
Some theories state that big bangs occur by chance alone. Some state that the universe has always existed in some yo-yo state. Okay with both... But now, are such big amounts of mass and energy also so naturally tied with such "chances" or "permanences"? Would it not be more likely to have a smaller universe being created by "chance"? Or to have infinite amounts, in case it is permanent? Or is there likely something more needed for explaining such big amount we have in "our case"?
Could the amount be derived from some cosmological constants somehow?
Regarding anthropic principle:
Is the total amount at least somewhat related to some other important parameters and laws we have, that are in turn related to support for life?
For example Earth and Sun are rather normal among other similar sky objects that just "might" support life like ours. Which means their size is meaningfully related to other physical properties leading to support of life.
I do not see such anthropic-principle connection with the total amount of energy and matter in our Universe.
A slightly related question, though I would not constrain my question only to this theory. Also the amount still needs explanation: Is it possible that the Big Bang was caused by virtual particle creation?