So what you described is this: https://github.com/libbitcoin/libbitcoin-system/wiki/Social-Network-Principle
These are some of the places it can be used: https://www.lightningnetworkstores.com/
Its also important to note, that it doesn't *have* to go up in price. The belief that the current monetary system is messed up is enough for the foundation of Bitcoin users to stay around.