If Nakamoto does appear and decides to cash in the Satoshi stashor threatens tothe bitcoin market would almost certainly collapse.
https://finance.yahoo.com/news/paxful-founder-makes-wild-proposal-161450915.htmlI have no idea but I think Bitcoin is no more in control of anyones hand. May be we will see a sudden crash but then again people will start to buy and market will stable. Who would miss to buy something which is on sale?
For the last 10 years people were expecting all sorts of crash but Bitcoin survived. Bitcoin will survive till the end.
Burning Nakamotos coins is possible, if incredibly unlikely. If the whole network came together and agreed to move the coins into a different, inaccessible, account, then Nakamoto would be unable to access his/her/their fortune.
This will be a disaster. They are asking perform a 51% attack. This is stupid and dangerous idea in my opinion. Tomorrow you will ask to burn someone else's Bitcoin if you do not like them to have huge amount of Bitcoin. Bitcoin was created to have peace in mind that no one can touch my money.