Everyone who bought bitcoin under $4,000 has stored their value quite well in it then....

To be clear that is anyone who bought or earned bitcoin between January 2009 and October 2017 (8 years and 10 months) that can sell their bitcoin for the same amount or much higher amount than they purchased or earned bitcoin at originally.

The fact that speculators with hedge fund dollars came into it last year, does not change the fact that it is a decentralized store of value that can be owned by anyone around the world. If you have stored your money from one nations currency in bitcoin and then move or travel to another country, you can still remove the equal amount in another nations currency without needing 3rd parties involved.

This doesn't happen with national currencies for large amounts of money easily or for free. National currencies printed by central banks need to "stay in the system" and be tracked by the central bankers and government.

Some of us are more than willing speculate that this form of storing and transferring value will increase to the point that some national currencies (Bolivar, Zimbabwean dollar) will be proven for what they are...printed paper that central banks manipulate.

Look at the Indian Rupee or Indonesian Rupiah if you want to see a currency that sucks to store value in, people don't want those currencies anywhere in the world.

Whether it takes 10 or 20 years there will be a store of value, that isn't controlled by central bankers, so people can own and control their wealth safely and securely in the future. It's probably in bitcoin already though.