I think you will not see their true address active because they are surely just holding it till the right time came, they are not that idiot to sell it because its their work if the trust dont start from the inventor then there will be no trust will come from others.
What if the said Bitcoins were sold at plus $19k a d then bought back at a price level of $5k or 6k. If it happens like this then we can't say it an idiot approach, in fact it will be a smart approach. For satoshi nakamoto it wouldn't be hard to show a clone address. After all he is the inventor and he would have enjoyed it's benefits more than everyone else.