There are many people from the early days that have 3k BTC. There are a bunch on this very forum with 10k+.

It looks like one of the output addresses is stamp's trading wallet, so it's likely that this guy is looking to cash out 1k and hodling 2k.

I hope this person gets a vacation house somewhere nice as it takes some nerves to hodl through the extra long sub-30 sub-1000 dips. But it is silly to implicate Satoshi. There's absolutely no reason to believe it is as there were plenty miners in 2010.

Also, look at the depth of the exchanges today. 1k coins won't even move the needle.