How about the total supply? 1.5 billion ?I am confused.
What are you confused about?

Maybe this is too big supply as per question it seems he is asking about is there any chance to get reduce the supply by increasing the price of token like if price will be $0.1 than it will cut off 10x.
There are a lot of coins / token with the same supply.
But this is a total supply.. not the circulating supply (mostly not all tokens are sold)
I'm guessing the total coin supply will not be pumped into circulation all at once like that. Might be annual percentile distribution
So definatly slow incriment to the supply will ensure a stable price and market liquidity .......correcte if am wrong!!
One incomprehensible question and so many assumptions

I advise to read white paper - very detailed document. And if some technical moments not discribed there the logic of them are obvious.