Has there been adoption for essential goods & services? All I've seen so far are Internet services.
If bitcoin will become a major currency, it will have to have a phase where it cannot be used in general and only with a small number of companies. That's not evidence that bitcoin will not become a major currency, it's evidence that it hasn't yet, and nobody claims it has.
So at this point it's really an investment vehicle and a convenient method of exchange, not a replacement for fiat currencies.