What if bitcoin gains much more value than you anticipate? So what happens when 1 satoshi reaches the price of 1 dollar?
What kind of arrangement is made if payment is requested as Cent? Can the bitcoin core be modified?
If 1 sat reaches $1 , then all of us that had a million sat , will be rich.

Bitcoin Core Plan is for all transactions to move offchain to the LN Network, so your cent transfers would happen there.
The only real issue, is can Bitcoin Core Coin actually reach $1 per sat and anyone be able to pay an Onchain transaction fees,
which would be astronomical.