Bitcoin has survived from 2009 to 2025, which means it has had a journey of almost 16 years where Bitcoin has come this far through various ups and downs. It is expected that since the strategic reserves of various countries of the world have accepted Bitcoin, it can be said that it will be able to survive for ages. However, if Satoshi himself were to publicly make changes to Bitcoin or destroy Bitcoin, then that would be a different matter. However, if he remained behind the scenes or indirectly hidden, then Bitcoin would definitely survive for ages.
I don't think satoshi can do any chances to the Blockchain, he isn't the one controlling it. He might have created it but it's now being ran by the community and we'll have a say on how things are done. I don't think he did any thing to the code to be able to control it later because it would had been figured out by now. Bitcoin can survive this next generation and others to come because it f the community that's backing Bitcoin. We have very good believers in the community that'll help to avoid any misfortune to happen to Bitcoin. As far Bitcoin is still being traded on all exchanges and having the type of volume that it keeps getting, I don't think there's anything that can stop Bitcoin because the government still couldn't end Bitcoin.