1 million bitcoins is bit much now. estimated value of that is 5 billion$ just for holding the bitcoin.. what if satoshi nakamoto invest in ethereum and all the top 10 alternative coins today.

do you think bitcoin will be monopolize as well in the near future just like all banks that control by rosthchild?
I think that he wouldn't even be able to sell all of his bitcoins on any exchange that easily. I mean, there is no suffiecient demand for 1 million bitcoins just like that. Maybe that's why we don't hear about it. He keeps it for the future, when everyone will be using bitcoins or when all of them will be mined, so that there is his last supply to the community.
you have a point.. but on this day you buy plenty of things using bitcoin. many countries now accept bitcoins for buying real estates .. so maybe even there is no sufficient demand for 1 million bitcoins. he can use few bitcoins of him to buy real estates or things that he need

because i myself keep bitcoin and use a little bit as a reward for myself

Apparently, that is why it is a currency and it will gradually exchange hands as you need to keep buying some stuffs and all. However, it is an innovation and satoshi (either one or more persons) apparently will make a whole lot from their innovation as people keep buying into it.
A time will come that even what he will end up having will be too much to go around as it is right now cause even a million bitcoin is not a small amount of money. Then I wonder what would happen when a value becomes extremely large as some have speculated, then mahn! Those accounts would be worth a whole lot. That is life anyway.
I think, assuming satoshi is still alive, it would be very dangerous for them to start to move the bitcoin that were mined quite early on. Because people will start to notice, exchanges will be anble to check previous transaction logs. But it's even more dangerous for satoshi, because if they were to 'cash out' their bitcoin and move their money to a bank account. Of course the exchanges have the data and all it takes is one leak and we've got the true identity of satoshi.