I believe those blocks weren't all mined within 10 minutes because of the low starting difficulty and slow difficulty retarget time. It could've taken just a few seconds to mine a block after the genesis block.
If you want a currency where funds can be frozen and stolen so easily I suggest you stick with US dollars. You'll discover that Bitcoin isn't going to be able to satisfy your urge to take what belongs to others so easily.
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If you think you can identify with certainty "ten thousands blocks" that were mined by Satoshi, then you probably don't understand how bitcoin actually works.
If you think "It could've taken just a few seconds to mine a block after the genesis block", then you definitely don't understand how bitcoin actually works.
If you think there's a chance to "get a hold of those coins" without the private key, and/or that it is as easy as "update/modify the current sourcecode", then you've got a LOT to learn.
With some research you can see which of the early mined coins are untouched. These were probably mined by team Satoshi.
Have you got any knowledge about how the difficulty functionality works? Seems you don't. The starting difficulty was so low that it took seconds instead of 10 minutes to mine a block.
I believe some double spending happened in the early days..
There definitely are ways to get access to the coins we are speaking about.