I bought $80,000 of fiat currency with Bitcoin.  Does that count?

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Thank you.  That's exactly what I was looking for.

And especially the original report on Stack Exchange:
http://bitcoin.stackexchange.com/questions/2828/how-many-bitcoin-addresses-are-have-been-carrying-a-balance/2849#2849

Amazing that as of a year ago, over 24% of all bitcoins were held in Addresses of exactly 50 BTC.  I bet most were generated during 2009. As soon as mining pools started, it was probably more rare.

I agree.  But the reason I found it fascinating is that (if i recall correctly), the number of 50BTC addresses was so large - like 40,000 addresses.

40,000 addresses is 2M BTC, or nearly 20% of the mined currency.  It just seemed like a ridiculous amount of cash just sitting there.

So I'm thinking maybe my recollection is incorrect.  Maybe it was 4000 (or 2%)....

About a month ago, there was a discussion that mentioned that there are a TON of addresses that have 50 Bitcoins in them, and that 50 BTC was the most (or second most) common balance (possibly second to 1 satoshi balances).

Can anybody direct me to that thread, or get me the stats on that?

Here are the specific figures I am looking for:

-  How many Addresses have exactly 50 BTC?
-  How many Addresses have received the block award (50 or 25 BTC, plus fees), and have not had any outbound transactions.

More lies.  September 2011 was less than two years ago.

(just teasing ya.  I really like BitVegas!)

My calculations are:
412 addresses, 3,424,831.01 BTC total, 8312.6966 average.

Value at $29.30 / BTC (roughly the current rate):
$100M total, $223K average, $87K lowest
31% of the issued Bitcoins are held by the top 412 Addresses.

I'm sure many of these are businesses, some being the cold storage of numerous people's individual accounts (at Mt. Gox, Coinbase, etc).

Can I please be whitelisted oh wise and powerful one?

I'm surprised there isn't more interest in this.  Does anybody like it?  Anybody see a use for it?

Here's a great post that's an introduction to Bitcoin:
https://bitcointalk.org/index.php?topic=7269.0

Not sure if this is of value to anyone, but I thought I'd put together a little Javascript / AJAX balance checker. Feel free to borrow or steal the code.

Basically, you put the Bitcoin Account or the FirstBits into the query string, and out pops the balance, along with an estimate value in US dollars.  The values for current balance, recent price, and bitcoin address given the FirstBits, are all retrieved by the client using Ajax.

http://btcbal.com
http://btcbal.com/?17chk4u81QdP26e8ieHWhhTsVF4RQh8fAh
http://btcbal.com/?17chk4u



Sample output:

       Bitcoin Balance for 17chk4u
17chk4u81QdP26e8ieHWhhTsVF4RQh8fAh

Current Balance:    0.001    Bitcoins
    Recent Price:    $21.43    per Bitcoin (weighted 24 hour average)
             Value:    $0.02    


Conversion to other currencies is an exercise left to the reader.

Of course, it's dependent on the reliability of blockchain.info's API.