Shouldn't all crypto be backed by bitcoin ?
Know this, many cryptocurrencies were already back by bitcoin unknowingly to so many users, bitcoin is the only acceptable digital currency with good reputation while others claim to be currencies as well but coming after bitcoin, that's why you could finds out that bitcoin determines how far other cryptocurrencies could go in volatility.
How could a "Bitcoin Standard" emerge? For example, if you could pay for food service etc everywhere with bitcoin, would that be enough to essentially drive bitcoin as a backing standard ?
You need to know that bitcoin is the only most acceptable digital currency as a means of payment or for exchange of goods and services, while many altcoins are shitcoins, this make them not serve the purpose of being used for payment by some organizations, they would rather prefer in bitcoin