I agree with 90% of what you siad, but again look up the Bitcoins Biloierins they are all smart and math genius like Satoshi himself
look up cicada 3301 a lot of people think that Satoshi is a group of cicada 3301 members, Satoshi was a math genius and he deliberately created Bitcoin's system so it become harder and harder to get (halving) and had a market cap of 20 million at max
you need at least 1000 hash to locate a block now a days and the rewards dose not even worth it anymore.
so, in a certine year Bitcoin won't be mined no more which will make it price stronger than ever and the 1 million Bitcoin owned by him/them will be used to there project.
as I said before I can't say that Satoshi is good or evil, whatever he want to do will be bettre than what we have today
But what you are talking about are strictly rumors and speculation. There is no proof Satoshi was even a math genius. Satoshi may not even be one entity, it could be a group of smart people who put Bitcoin together.
There are a lot of speculations about who Satoshi is or was, but there is no real proof for any of the theories to become more or less valid. Mining is still worth it, just not the way it used to be a k a home Mining. Things definitely used to be much easier back when one CPU was equal to one Vote. These days are over however, we have a much more powerful Bitcoin. All the many thousands of Miners are not doing the work in vain, some of them are voluntarily doing it just out of support or to try and hit the Jackpot which is also pretty much impossible today, but many of them are doing it to get more Bitcoin or even make a hefty Profit.