Who cares if it becomes 50gb? This question is ofcourse one of the major dangers but listen:
50gb means SAFETY. Nobody can steal that wallet from Your PC.
50gb is about 10% of a normal or even small harddrive
And when it becomes 500 gb, who cares? By then we will use Exchanges and apps in another way, we dont have to hold that 500gb on Our pc anymore all we need is for a Companies/banks server to do it for us while maintaining Our Security logging in.