So i have all this money...but nothing to spend it on.
In the past three Assassin's games after you finish the story most of the time you'd be left with a crap load of money that you have absolutely nothing to spend it on. Unless you saved the renovations until after the game of course. Either way, your still left with too much money.
So any predictions as to how this could be fixed in ACIII?
They said that they improved the economy system. But how they did is relatively unknown. I'll admit that it took me longer in ACR to get enough money to buy things throughout the story, but you're still left with tons of money in the end. Hopefully they make it feel like you actually accomplished something when you make money.
The economy system has been removed.
You will exchange animal pelts/meat for goods, from what I understand. Also, the quality of the pelts (and what/amount you get in return) varies on how the animal is killed, ie, a single arrow in the right spot should get you more than a mangled animal you attack with the tomahawk. Hopefully it will be difficult to get a perfect pelt for exchange...
There are also rumors of a property system... but there are no cities to rebuild or buildings to renovate.
Also, no bomb crafting... that was Ezio's thing.
“Force has no place where there is need of skill." Herodotus
When I saw the topic title I thought you literally had a lot of money to give away. 
Go to Piri Reis and buy ingredients make bombs and have fun
"Let the patriots fight their battles, I'm here for the Templar."
When I saw the topic title I thought you literally had a lot of money to give away.
I wish i did.
They never said the economy system was removed, they said it was changed, though it probably will involve hunting in some way. Doubt that's the only thing you can do to make cash.