You nailed it. But keep it simple. #Bitcoin is your energy/work STORED as energy/work by the system using math, so you can use your stored energy/work at ANY future time YOU want.
In Bitcoin terms - no one controls your efforts in life but YOU if you save/store/use Bitcoin.
It's so simple it's illusive. It's what humans have been trying to discover for thousands of years since the time of bartering for goods/services started.