106 Million people own Bitcoin. Being an Internet Protocol (like all blockchains) it can reach any user or device on the internet - upwards of 4.66 billion!
These "Internet of Record" protocols are a new way of transferring and documenting records on the Internet. Crypto's have the fastest rate of adoption in human history.
Standardized record keeping and programmable integration to other internet-based applications make for a simple solution to a modern problem. It has better settlement times than our traditional settlement system and Bitcoin's ledger is synchronized and immutable. Faster speed and efficiency lower peer-to-peer and bank-to-bank payment costs.
Bitcoin's blockchain (ledger) hasn't been hacked since inception (2009). Although exchanges have been hacked, the ledger itself has NEVER been hacked. 13-years of security and uptime is not something to be ignored.
Decentralization is key to keeping Bitcoin's ledger secure, with over 12, 130 public nodes. You'd have to hack 50% of them all at the same time to manipulate the ledger.
As Bitcoin continues to be the protocol and network of choice; its token scarcity remains relevant. It's protocol is design to only mint 21 Million Bitcoins, ever.
Although, as more blockchain "record keeping" protocols saturate the market, scarcity is threatened by market share loss and potentially more efficient protocols.
People recognize the unit of account - just as they know the price of an item in $USD
The items can be exchanged AND its largely recognized and accepted elsewhere
The value will remain, at least until you make the next transaction.
USD's became intrinsic once it de-based from the "gold standard" and became fiat money.
It's value comes from governments forcing its use, and the trust in central banks to keep the value stable.