I am pretty sure Germany is going to defend its title this year. The last games showed how competitive they still are; assuming they will play even better at the tournament since germans are best when there is something to win.

I like your idea about Germany.
They don't have any choice but to defend it. Imo they won't successfully defend their title this year because the last time a team won back to back on the World cup was between 1960 to 1970.
If anyone wants to bet with bitcoin the odds on
Nitrogensports looks like this. It's interesting that they favor Brazil over Germany or a lot of people bet on it which caused a massive movement on the Brazil line.
http://prntscr.com/j45zgq