Satoshi owes you some Bitcoin for maintaining his ledger. He will never, ever pay up. A pretty silly investment but it did have a lot of libertarian technerd hype around it.
Discussion
Satoshi owes no one anything, the maintenance of the ledger is paid for by the block reward for now (dilution of outstanding shares) and transaction fees forever. Holding Bitcoin as savings is a speculative action (like all savings and investment) but it’s not an investment because holding Bitcoin will never produce more bitcoin
It's not savings because you don't actually control it, the consensus network does. If all goes well you can influence that network to deliver value to you in future, but that is true of all investments.
Again, you are adding things to the definition of savings that do not apply. Unilateral sovereign control is a desirable but not necessary component of a savings instrument. All that matters for the definition is that you have value/purchasing power now, and you want to preserve as much of it as you can until a later date, so you utilize this thing to do it. That’s it.