the more adoption the more stable it will become, there are also other crypto's called "stablecoins" which are 1:1 to the US dollar or other government fiat currencies, theoretically a standard value token can be implemented that is a stable coin but derives its value based off of bitcoin, or people could just use bitcoin for transactions, however i dont think people want to deal with that many decimals to buy a sandwhich (yes, you dont need to buy one bitcoin to own bitcoin, you can buy .000003 bitcoin)
Trust and enforcement. Who will enforce the weight of the value once payable? The dollar has the most powerful country to back it up.
the more adoption the more stable it will become, there are also other crypto's called "stablecoins" which are 1:1 to the US dollar or other government fiat currencies, theoretically a standard value token can be implemented that is a stable coin but derives its value based off of bitcoin, or people could just use bitcoin for transactions, however i dont think people want to deal with that many decimals to buy a sandwhich (yes, you dont need to buy one bitcoin to own bitcoin, you can buy .000003 bitcoin)
mBTC
Satoshis