They hope it will "excite" you enough to do whatever they ask.

They deliberately SPAM millions of people.

They don’t need many to fall for it to keep doing it.

Please report them as SPAM and to the FCC.
References :

The reason it appears to be delivered to the wrong address, is probably because your adress was included in the Blind Carbon Copy header, which is not included in your version of the email.

Spam is usually sent to large lists of emails simultaneously. These come from databases that will probably list the addresses alphabetically. Hence why the one so similar to yours appears in the To: header field.
References :

Special Situation Report‏
From: karina montesinos olivares (karina_cool_9@hotmail.com)
You may not know this sender.Mark as safe|Mark as safe
Sent:October 19, 2009 6:07:49 AM
To:dancin_dan@hotmail.co.uk
Successful companies aren’t born, they’re made – and they have to work their way from humble beginnings and through the ranks just like everyone else. When it comes to our microcap stock investing, I’m in it to win and win big � and that means the goal is never to hit less than a few 10-baggers in every microcap bull cycle. This week we’ve identified one microcap stock that is on its way to changing the game in its respective market, The Wyncrest Group, Inc. (Pink Sheets: WNCG – News), an innovative a niche insurance consortium. The company has six planned acquisitions that could catapult the company�s revenues to

$50,000,000.00 in 2010! The stock is currently trading at $0.05 and our near term target is $0.43. Load up on WNCG before all the trend chasers… and cash out while short traders continue tripping over themselves. Watch for big swings upward and momentum trading in WNCG as the stock continues to gain momentum and trade under the radar of the Wall Street traders.

WNCG is also in negotiations with several acquisition targets developed over an ongoing two-year campaign to find distressed agencies and consolidate contract assets under one lower cost platform. Through its Wyncrest Offshore Services Division, the Company is expanding into the growing offshore insurance and reinsurance market by offering a variety of services and products, including a liability program for helicopter flight training schools and non-owner helicopter pilots, and a line of Warranty Service Policies operating as a controlled foreign corporation. Royalty income is expected from licensing insurance products patented under a new category of business methods, a strategy taken only by a few in a new class of small innovative insurance companies leading the industry! Don�t let this super gem slip through your hands. – BUY

that dancin_dan@hotmail.co.uk isnt my email but is close to mine (dancin_danny@hotmail.com) so my question is, why was this sent to me? I sent the other dan guy an email and never said it was not delivered (failure email never came up as it usually does when the email address is wrong so this email does exist.)