Apple adopting Bitcoin isn't even remotely likely. Simply put, it is impossible that Apple will adopt Bitcoin.

The term adoption when used in relation to Bitcoin is consistently misused. When merchants use a service that accepts Bitcoin from holders and converts it into fiat for themselves, they are not adopting Bitcoin. They are exploiting the popularity of the term and converting BTC into fiat. This is not a case of merchants helping Bitcoin but a case of Bitcoin helping merchants. Equally, overall fiat conversion into Bitcoin isn't increasing but decreasing.

Bitcoin is being stress tested and the question isn't which load will make it move faster but which push will make the load lighter. And I see no discussion regarding real Bitcoin development. NXT, Ethereum, Exocoin, NEM and maybe even to a certain degree Monero and Emunie are where development, not armchair discussions about development, is happening.

It is impossible to know which child will grow to be the greatest adult though even if we knew, we still would be left with a definition of great that may be incorrect.
Bitcoin has hit adulthood and is great but it is very limited. Trying to change the definition of 'great' only helps with making it impossible to call Bitcoin great without doing a single bit of work toward making it greater.