What could be implications of this? Will we still have internet access?
This is not the first or latest satellite to be destroyed, and internet worldwide connection is made with bunch of underground and underwater cables and has nothing to do with any satellites and I don't know why so many people assume something like this.
2) How will it impact Bitcoin?
it can only affect Blockstream and other satellites if something hits them, but it's unlikely anything like this will happen.
3) What would be best strategy to prepare for a world with impassible space debris surrounding orbit? Which assets will be a safe haven?
I think you watch a lot of sci-fi movies and you can't do anything about that, so better try changing some things in your life that you actually can change.
Use Bitcoin, stop trusting your government politicians and don't blindly obey them or their rules and regulations.