The theory that Satoshi Nakamoto might still be alive and even active in the Bitcoin network, especially with recent transactions involving old accounts, is always a hot topic of debate in the crypto community. If the 50 BTC from the mentioned wallets were indeed moved on September 20, 2024, it would certainly raise eyebrows.

1. **Wallet Activity**: The addresses you listed, created in 2009, belong to the early Bitcoin era. Whenever large amounts of BTC from early wallets move, it attracts attention. However, it's essential to note that these wallets could belong to any early Bitcoin miner, not necessarily Satoshi himself.

2. **Community Reactions**: Whenever such movements happen, speculation runs wild about Satoshi being behind the activity. However, there's no concrete evidence proving Satoshi himself is still alive or involved. Even if these funds were moved, it could simply mean someone regained access to the private keys after many years or inherited control of those funds.

3. **Satoshi as Adam Back**: Adam Back, CEO of Blockstream, has been one of the frequent names linked to being Satoshi, mainly due to his cryptographic background and early involvement with Bitcoin projects. However, Back has always denied these claims, emphasizing the decentralized nature of Bitcoin, which Satoshi himself championed.

While these transfers, if confirmed, could stir up interest, it's important to wait for blockchain analysis and further investigation before jumping to conclusions that Satoshi is back in action.