Bitcoin has a fixed supply of 21 million Bitcoin but we have satoshi as you can send fractions of satoshi therefore Bitcoin supply doesn't need any alterations. Anyone that wants to do that will only get himself his own Bitcoin and they'll all fail like Bitcoin cash, Bitcoin sv and the rest of the forks that all failed. Satoshi himself can't alter the supply of Bitcoin as Bitcoin is no longer under his control although he started the whole thing but Bitcoin is now owned by the community and we have the final say. Any alterations to Bitcoin supply creates another altcoins while Bitcoin will still be existing.

Satoshi needs the community approval to do that but lets say he somehow removing the whole 21 million supply limits, it takes aways the Identity of Bitcoin and just proves that it's actually a centralized coin and not decentralized as it claims but that won't happen so we can't stop thinking about that and concentrate on how we can lower the fees and make the network les congested and more appealing to merchants so they can accept Bitcoin and increase the adoption of the currency.