According to the mtgox walls, 23 Million USD takes us to a BTC valuation over $1000. Not a lot of money in the whole scheme of things.
You should know that means nothing.
FACT: according to the order book, someone willing to cash out just 18 Million USD takes us to a BTC valuation in the low single digits. Not a lot of money in the whole scheme of things.
Imagine satoshi decides to cash out the 1M
BTC he has, because is time for him to retire. Yes, you know what would happen: BTC would suddenly go to 0. And that will happen, sooner or later, because nobody can wait to be rich forever. Just pray that the market depth will be 10,000 times bigger than now, so we just go to low double digits when he decides to sell, and not straight to 0.
If he is smart enough to invent bitcoins, he is smart enough to sell responsibly. I believe.
Well, I would be more confortable if he would have moved some coins, gradually. He never moved A SINGLE COIN according to the blockchain. Not even at the peak of 2011 bubble, not even at $200 BTC/USD.
Frankly, people sees this as "this guy really believes in
BTC potential!", but sometimes that just makes me doubt of his sanity. If he never moved a single coin in all his life, he is very well capable of dumping them suddenly. That's how I see it, and many times I think that he will destroy what he created in that way.
And remember that nobody can wait forever to be filthy rich.
Hope it's just a nightmare tough
hm ..not sure about this.
if I put myself in his/their position I would rather think that every move I made with my BTC would more likely be percieved as an unnatural event and cause negative assumptions.
I think staying low-key is the best he/they can do, because it changes nothing.
and we don't know anything about him, so no need to think he needs/wants to cash out, especially when his idea implies that you can purchase everything in BTC in the future.
also...who says, he just owns one wallet
It's just that I can't move from my house because I'm very fat. 
