Doesnt mean its impossible.
Plus yes Intel is worth more then AMD but if history tells is anything just because you are top dog and have all the money in the world doesn't mean you cant loose.
Once upon Yahoo was king of the internet and Google was nobody
Or Apple was once the underdog in mobile with Nokia being top dog
Then there was the battle between Myspace and Facebook
Or Netflix and Blockbuster
Or Vince McMahon and WWE/F vs Ted Turner and WCW
Ford was also a underdog against Ferarri in racing
Mozilla was a underdog against microsoft
This list goes on and on, point is just because you have a near monopoly right now doesnt mean you cant falter and fail
The only thing AMD doesnt have now is mobile but that can change at any time