You could eliminate those risky locations by excluding them as alternatives in your randomization process, but that would mean including a chain of reasoning!
Do I know that while I was trying to hide the coin I tought I would lose if I found it later?
Edit: Gwern said it first.
(You also don't formulate it right. If the memory-wiped self is told that finding the coin wins, and also that a former self placed the coin for him to find, wouldn't he infer that his former self would be trying to help him win and so would begin his search at a Schelling point? He wouldn't even consider trying to beat an adversarial strategy like 'randomize' because he doesn't think there's an adversary!)
I formulated a little problem. Care to solve it?
You are given the following information:
Your task is to hide a coin in your house (or any familiar finite environment).
After you've hidden the coin your memory will be erased and restored to a state just before you receiving this information.
Then you will be told about the task (i.e that you have hidden a coin), and asked to try to find the coin.
If you find it you'll lose, but you will be convinced that if you find it you win.
So now you're faced with finding an optimal strategy to minimize the probability of finding the coin within a finite time-frame.
Bear in mind that any chain of reasoning leading up to a decision of location can be generated by you while trying to find the coin.
You might come to the conclusion that there cant exist an optimal strategy other than randomizing. But if you randomize, then you have the risk of placing the coin at a location where it can be easily found, like on a table or on the floor. You could eliminate those risky locations by excluding them as alternatives in your randomization process, but that would mean including a chain of reasoning!