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Ian Kar, Benzinga Staff Writer

Bitcoin, the digital currency, has been growing in popularity over the past few months -- and a lot of major companies and organizations have been taking notice.

Here are some other companies that support the crypto-currency:

Overstock.com (OSTK)- Probably the biggest retailer that accepts Bitcoin, Overstock began accepting Bitcoin in January 2013.

Virgin Galactic - The Richard Branson-led aviation company started accepting Bitcoin for customers who are interested in flying to space and paying for it using Bitcoin.

Wordpress - The popular blogging platform used by some of the biggest media companies in the world, including The New York Times, CNN, Reuters, Mashable, NBC Sports, GigaOm, and TechCrunch, started accepting Bitcoins in November 2012.

The Pirate Bay - One of the biggest BitTorrent directories on the Internet, with an immense library of movies, TV shows, software, and music started accepting Bitcoins in April 2013. The site currently lets users donate to The Pirate Bay using Bitcoins.

Reddit - Reddit allows users to purchase Reddit Gold using Bitcoins, a feature they added back in February 2013.

Zynga (ZNGA)- The popular mobile gaming company announced that it would start using the virtual currency for purchases, which helped the price of Bitcoin to skyrocket past $1000 a piece.

PayPal (EBAY) - The payment merchant (and subsidiary of eBay) has been considering using Bitcoin as well. After a PR snafu that resulted in Paypal customer service saying that Bitcoin was against company policy, CEO David Marcus tweeted that Paypal was a “believer” in Bitcoin.

eBay - The giant online reseller may be another major online company planning on adding Bitcoin support. Sources told CNBC that eBay may be eager to expand Bitcoin support to include paying for items using the digital currency. eBay US and eBay UK users will be allowed to buy and sell Bitcoins on the mercantile exchange starting next month, a step in the right direction.

Tesla (TSLA)- Not only that, but regular brick-and-mortar stores are accepting Bitcoins too. A Lamborghini dealership in Newport Beach, Calif. blogged they accepted Bitcoin in the recent purchase of a Tesla, made for $103,000. The company also wrote they quickly picked up their second customer using Bitcoin. As the digital currency expands and becomes more better defined by regulators, expect this list of companies that support Bitcoin to be longer and longer.

OkCupid - The online dating site started accepting Bitcoin for premium services in April 2013.

4Chan.org - The Reddit-like image forum added premium services and the ability to pay for them using Bitcoin in December 2012.

Namecheap - A service that offers cheap domain registration, among other related services, started letting users pay with Bitcoin in March 2013.

EZTV - The popular site that provides torrents for popular TV shows began accepting Bitcoin donations in April 2013.

mega.co.nz - The new venture started by MegaUpload founder Kim Dotcom offers users 50 GB of free storage and automatically encrypted files in an effort to be provide increased security. In February 2013, MEGA started letting users pay for premium upgrades with Bitcoin.

Lumfile - A free cloud-based file server. Users have been able to purchase premium services with Bitcoin since December 2012.

Etsy Vendors - 93 Etsy vendors let customers purchase their products using Bitcoin. By seating for “bitcoin,” you can see other vendor that accept Bitcoin payment. Bitcoin Coffee - Get gourmet-quality coffee send to you by simply sending some Bitcoin.

Pizza For Coins - This service lets you order Domino's Pizza with Bitcoin. Just put in a name and address and you'll be sent to an online order menu. Pizza for Coins then verifies your payment and places an order within ten minutes.

Tigerdirect (SYX)- A major online retailer for electronic products, an a subsidiary of Systemax Inc, TigerDirect began accepting Bitcoin in late January 2014.

The views and opinions expressed herein are the views and opinions of the author and do not necessarily reflect those of Nasdaq, Inc.

The views and opinions expressed herein are the views and opinions of the author and do not necessarily reflect those of Nasdaq, Inc.