The reality of such a fiction is likely very different. As soon as coins attributed to Satoshi move, the world will have a very close look at it and will try to pinpoint the coin mover. Satoshi was smart and managed to remain anonymous. Other people aren't that privacy focused and will make errors that will reveal their identity.
Now you have a problem because there's evidence, see e.g.
http://satoshiblocks.info/ where the fictional miner "Patoshi" is attributed to have mined ~21954 blocks (give or take, the ballpark of ~21k blocks is reasonable), multiply that by 50
BTC and some say "Patoshi" and Satoshi could've been the same miner.
Personally I find the evidence quite compelling that above website presents and explains. It's worth a thorough read in my opinion.
Above balance isn't very accurate as some of the attributed blocks I used to construct the combo() descriptors watch-only wallet are false-positives. I'm not too keen to correct it because rescanning the wallet takes quite some time.With a stash of over a million bitcoins, should you have found the private keys as you dreamed about, you definitely have a problem, because now guess how many evil criminals or governments or who else will be after you. Don't expect they'd ask politely.
I'm pretty sure there's probably no place to hide on this planet for you, if someone believes you have Satoshi's private keys.
You can prove to have the keys. You can't prove you don't have them anymore. Not sure if you'd better burn the coins to OP_RETURN. Evil subjects would kill you anyway for such a destructive action, so you're doomed anyway, unless you choose to not move any of the coins, burn the keys and forget about it. Let's hope for you nobody saw it.
If you can cope mentally with such an outcome, I don't know. I guess it will haunt you for the rest of your life. Choose your dreams wisely.
