You should own and save in bitcoin for the two worlds we will have in 20+ years
Physical: In 20 years a block reward will be less bitcoin and exponentially more watts will be used to mine it. This is important because the main input cost to anything physical is energy.
Digital: Technologies using bitcoin base layer and lightning will allow people to subject others to physical constraints over a digital space. This will be used via divisible units of bitcoin. Lightning has not been properly thought of as a way to subject the implications of natural law to people over the internet but it will give people the ability to choose that whenever they want/need to.
A proof of work scarce digital store of value that no one controls would be a winner take all game. There will not be other proof of works with significant portions of global use. It is inevitable that it would become a way to escape being unbanked, then mild inflation protection, then used in cross boarder settlement, then used for sovereign individuals to subject other actors to natural law in a digital space. Right now the transition from unbanked to being used for escape from just mild inflation is just starting.
