Libertarian possibilism means that people should have the freedom to do what they want, as long as they don't hurt anyone else or take away other people's freedoms. This means that everyone has the possibility (or the choice) to make their own decisions about how they want to live their life.
For example, if someone wants to start their own business, they should be able to do so without the government stopping them or making it hard for them. This also means that they should be able to keep what they earn instead of having to pay a lot of taxes.
However, libertarian possibilism does not mean that everyone can do whatever they want without any rules or consequences. For example, if someone wants to drink and drive, that is not allowed because it puts other people's lives at risk.
Overall, libertarian possibilism is about giving people the freedom to make their own choices while still keeping everyone safe and protecting other people's freedoms.