I’ve bought 100 BTC in 2011. Need help to find them for rewards.

[PytagoraZ]

In 2011 I’ve bought 100+ BTC on some cryptocurrency stock exchange and now I can not remember what was the site exactly.

Is this a true story? 100BTC is a very large amount for now. Did you just remember now that you bought 100btc? I don't know about bitcoin in 2011, but my prediction is that there weren't many exchanges at the time, so if this story is true then it shouldn't be difficult to find the exchange you're referring to. Even if such an exchange is found, I can't guarantee your bitcoins will still be there, especially if the exchange is centralized.

But sorry, I'm quite doubtful about your story 

[Marvelman]

In 2011, Bitcoin was still pretty new and there weren't many places to buy and sell it.  From what I found, one of the first was Bitcoin Market, started by the member dwdollar. Then the infamous Mt. Gox showed up and got super popular for a while. After that in 2011, a bunch more exchanges popped up like VirWoX, Tradehill, Liberty Reserve, Bitstamp, BTC-e, Kraken, Blockchain.com, etc.

There were probably some others too but those were the main players getting into the exchange game early on. 

[YOSHIE]

The reward of 10 BTC will be distributed in case we find this BTC.

Your request is really unreasonable, what is certain is that you yourself know the exchange site or wallet you had when you bought Bitcoin in 2011.

Even if you give away all the Bitcoins you have, no one knows except you.
What is certain is that exchanges or wallets have private keys or passwords, Obviously, if the site is known you can't take it, you don't even know the site anymore, let alone the key or password, you are really looking for a needle in a haystack here.

Are you suffering from amnesia, so you no longer remember your Bitcoin site, you are truly an unlucky human being.

[tvplus006]

In 2011 I’ve bought 100+ BTC on some cryptocurrency stock exchange and now I can not remember what was the site exactly. ...

Why only now, after 12 years, did you decide to find your 100 BTC? Have you been in prison all these years and you didn't have the opportunity to do this, or did you run out of money and decided to find your Bitcoins, which are currently worth $ 3.5 million?

In 2011, there were 2 exchanges: Bitcoin Market and Mt.Gox, but they are currently not working.

[Stable090]

In 2011 I’ve bought 100+ BTC on some cryptocurrency stock exchange and now I can not remember what was the site exactly.
 I’ve got only email which also was a login name and my passport information.
 I’ve made a purchase using my credit card but it is impossible to get a bank statement for the year 2011 now.
 There is no information about this purchase on my email also.
 Does anybody have any idea how to find out what was the site and where the BTC now ?

Bitcoin that you bought back since 2011, and now you don’t know where it’s kept, and you planning to get the bitcoin back. I'm sorry, I don’t think you can get it back. There is no magic that can be performed for you to get your bitcoin back, and how sure are you that the place where you store it still exists? Just forget about the bitcoin and move on with your life. If you have some money, you can just purchase another bitcoin and make sure it’s properly secured this time around. If you don’t handle it carefully, I won’t be surprised if you end up losing it again.

And then  we can try to find the owner of the bitcoin adress where the funds were transfered to... Is it real ?
 The reward of 10 BTC will be distributed in case we find this BTC.

No, it’s not real, you can’t trace the wallet that the funds were sent to, and if you know the wallet, what do you intend to do with? Do you believe you can get the person, or do you believe you can contact the person in any way when there is no way to reach out to the person? Just take heart and accept your loss, you can’t get back the 10 BTC. There are many people who purchased bitcoin previously and lost access to their bitcoin, so you are not the only one who has experienced a similar situation.

[alecfisker]

two more sites from early days
mtgox
coinpal
have to find their hot wallets some how (a lot of outgoing transactions) and go from there

[ImThour]

The chances of you recovering this money is near to zero. I know sounds harsh but I don't want you to stress yourself out and waste your time on the money which is already gone.
There is no exchange that is still alive from 2011, so the login username/password doesn't even matter.

[sokani]

<snip>

I just find your story hard to believe. How can you've this number of Bitcoin since 2011 and you're asking questions now? Another thing that makes it unbelievable is you not knowing the name of the exchange where you bought the Bitcoin. Between 2010 and 2012, Mt Gox, BitMarket.eu, Bitomat, MyBitcoin, and TradeHill were the platforms where one could trade Bitcoin at that time. If you stored your Bitcoin in any of the aforementioned, I doubt if you'd have any luck recovering your Bitcoin.

[cabron]

The chances of you recovering this money is near to zero. I know sounds harsh but I don't want you to stress yourself out and waste your time on the money which is already gone.
There is no exchange that is still alive from 2011, so the login username/password doesn't even matter.

I thought so too. If it's even in MtGox which is the most popular at that time, his 100BTC is all gone also. You couldn't believe the coins from MtGox would be returned.
OP must haave been one of those believers of this technology but forgot to send the coins to his wallet with the private key.

Having 100BTC today will make you live comfortably thats for sure. If there is just a way to recover it, he would likely do everything even fight a legal battle for it. But good luck OP.

[cafter]

in 2011, 1 bitcoin was worth around $20-$150 and you bought 100 bitcoins which will at least may was worth around $1000-$10000, this price range I took from investopedia.
so no one will buy something worth more than $1000 or even $100 and completely forget about it, and when price of 1 bitcoin reached $1000/BTC then also you were not able to remember that you had bought 100BTC.
interesting to read you story but most probably it seems fake.and if you may luckily find the name of the site, it may surely will be closed and there domain will be on sell somewhere godaddy or something. and you found their wallet and your coins in it they will not going to pay you this much huge amount without asking for very solid proof.