I presume you are talking about the upgrades that give you more businesses. Those upgrades don't actually need to be saved as when buying them, they do not increase the price of said business.
Once upon a time there was 3 kids who wanted to be evil magicians. When they grew up and became magicians, they somehow got stuck in their own cage that actually was for decoration, died, and somehow they were buried, loving each other. The End
Me:Get out. Game:No way dude, no way
Me:Your saying I'm stuck here? Game:I don't have any clue what your trying to say
Me:Don't you understand I'm trying to get out of here? Game:Does not compute, lolz
Me:??? Game:Does not compute, lolz
Me: Commit suicide. Game:Cut that out you're bothering me!