It would be incredibly annoying and throw the world into panic mode for a bit, but then everyone will just switch to completely digital currencies like 92% of world currencies are.
That panic mode would go something like...
- "oh I got this large amount of money. let me put it in the bank/spend it"
- if they spend it then yay they get a bunch of free stuff which no one really notices is free other than all the computers say "more than what we expected was bought here so produce/send more here" which wastes resources when noone buys it the next cycle which inflates the currency by some ammount. And that small inflation is done millions of times across all systems.
Or because so many people all of a sudden get money all at once it also can create a run on products through someone buying too much or too many people wanting it at the same time which raises the price which causes inflation too.
- If on the other hand people instead deposit this money then the computers will go "ding this person suddenly has more than 10,000 they are putting in the bank, where is it coming from?" which will then be investigated and someone will know what happened and as a result all these large transactions that are out of place will be rolled back.
There is also the possibility, though very unlikely that it could lead to a good stimulis by way of the rich realizing what is happening and just deciding to take the lose and simply work with the government and bank to figure out how much currency was "added" and simply remove that as a type of tax on the company to balance the books. The reason this would be good is that most of the problem as it stands is that the economic system of the world has a blockage in the arteries which is keeping all the capital in the hands of a few, whether they want it or not. 852
A sudden influx of capital to the poor and the rich just taking this hit would be like creating a temporary new artery around the blockage, but considering they wouldn't do this it doesn't really matter.
Another possibility is that some people realize that depositing 10k+ probably isn't a wise idea, especially not soon after event and they'd hold onto the currency and deposit it in smaller amounts. Not enough people would do this to make a difference, but if you were to do this you'd have to do it within about a year or two window, before everyone goes to all digital and will no longer accept physical currency...
Also, this is less of a problem than you might think because all physical currency has marking of some sort that set each piece apart from any other piece. Much of the "money" would be useless because these markings wouldn't mean anything to them and reproducing it would result in random symbols that would be unusable or would be duplicates of bills that already exist and you could just invalidate all bills which are known to be duplicates. The Legitimate holders would be unhappy, but more than likely the legitimate holders would be the aliens if they don't try to duplicate the security marking patterns so it would just take a short period to realize then issue a statement that those aren't legitimate. 159