Close to impossible if we use 2009.
There were 7200 mined per day, assuming no satoshi it would still be the supply of 207 days, adding those coins adding coins that would be lost not sold the guy would still have to go into early 2010 to accumulate that when the price was already higher, not to mention he first jump to over 1 cnet for btc in June.

So, highly unrealistic.

It is possible, it all boils down to how long that particular investor was able to hold. Because their are folks who had nice amount of bitcoin but they sold it early due to some ATHs bitcoin undergo then before getting to where it is now.

So alot folks emotions where put Into test and they fell for it by selling early, but there are chances, that some folks at there have hold their bitcoin for long till date , and they are some in this forum especially those in the WO thread.

Don't get confused. No one buys Bitcoin at that year and when Bitcoin was in its infancy. Having that amount of Bitcoins is in likely possession of satoshi leaving that much. But in estimation says, that's only around 750,000 to 1,100,000 BTCs that we'll never know if it will move somewhere in the future but most likely it won't.

So realistically it just wouldnt have happened by any means then?

Look at this, https://postimg.cc/r0nBmpwt

So, what you guys are saying is that 1500 bitcoins for 1 usd isnt a literal amount then?

do you know there are people on ebay today that advertise a standard british 50p coin for £250 ... and no one is buying it.. advertising a price is not the same as opportunity and evidence of people taking up the offer

if you look at bitcoins (realistic) history you will see the notable events of:
satoshi giving hal 10btc for free in jan 2009
laszlo got 2 pizza for 10,000btc in 2010
the first proper bitcoin exchange opened at a starting rate of $0.03/btc(with people buying at this rate)

so if you are asking about a group of early adopters that realistically bought at, and took up an opportunity to buy coin at its cheapest openly available rate of the best opportunity, of a accessible exchange thats was used, then the numbers are that today they would be sitting on $3.4billion

your other numbers are not realistic opportunity of feasibility to have had early adopters take up the offer and hoard

your own words realistic

well there were people buying in 2010 (unlike your assumptions of 2009)
there are logs on the blockchain of coin(not creator satoshi's stash) still held from 2010

however most early adopters were selling in each ATH of 2013,2017, 2021.. so the amount of early adopters still holding and still have keys to sell bitcoin now, is a small amount. but far more odds of realistic feasibility compared to your 2009 assumptions of buyers

also to remind you the screenshot of the new liberty standard(you referenced before) was not showing an exchange rate based on sells already performed. it was actually a price valuation advert, based on calculating mining cost of most efficient CPU and calculating electric costs.. and then advertising his willingness to buy coin at that rate for his $100 desire limit of paypal
but from all history and people researching and looking at the past it doesnt appear anyone really took the offer and it was exchanges and bitcoin pizza in 2010 as the first real deals of realistic trades

It's not exaggerating because this is practically very possible to happen, though the chances of it happening is very low.
It will be extremely difficult to find someone who will buy $1000 worth of bitcoin in 2009 and still keep all of it till today without having sold any part of it.

The only way this can easily happen is -
1. when and if after buying the coins, the investor somehow forgets he or she ever bought bitcoin until this very moment - still have very low chances of happening.
2. When and if after buying the coins, the investor loses access to their wallet by (maybe) misplacing their wallet's private key or seed phrase - high chances of this happening, infact, we have seen or heard stories of people who bought or mined alot of bitcoins in its early days, who today can't access the wallet where those bitcoins are stored.