One of the more exciting start-ups in the tech space comes in the form of a pocket-sized, half-inch plastic square. Said plastic square can be plugged into the audio jack on your iPhone, Andoid, iPod or iPad and transformed into a mobile credit card processor. That’s the premise behind Square – an inspiring start-up with 100 employees based in San Francisco. The IPO rumors haven’t started up yet, but there are lots of reasons to be excited about this small company (even before we’ve gotten a chance to look at any financial documents). Here are three reasons to invest in the Square IPO (when it finally arrives):

1) Leadership. Investing icon Warren Buffett argues that you shouldn’t invest in companies but rather people. “You can have the greatest goals in the world, but if you have the wrong people running it, it isn’t going to work,” he said recently. “On the other hand, if you’ve got the right person running it, almost anything is possible.”

Without question, Square’s got an excellent pedigree. One of the company’s co-founders, Jack Dorsey also co-founded Twitter, rising at one point to serve as CEO (he’s now a chairman working on product development and growth). That takes up a mere 8 to 10 hours of his day. After that, he ambles down the road to clock another 8 to 10 hours of work at Square.

“Most people have major positions at companies and they’re also raising families,” Dorsey told Fortune last week. “They have two-year-olds. I have it easy.”

Best of all, Dorsey seems to possess a sense of a wonder that he uses to inspire the developers working below him. He does that in part with his weekly “town square” meetings where he takes 15 minutes or so to talk values and aspirations with his employees.

In a recent town-square meeting, he compared what Square’s doing to building the Golden Gate Bridge: “Every single aspect of this is gorgeous,” he said (per TechCrunch). “So your homework this weekend is to cross this bridge, think about that, and also think about how we take those (design) lessons into doing what we do, which is carry every single transaction in the world.”

2) The volume game. Numbers aren’t readily available, but we do know that Square is “processing millions of dollars in mobile transactions every week,” according to NPR. Let’s conservatively say the site’s processing $2 million in transactions weekly. That’s good for more than $225,000 in revenue. Not bad for a company that just opened its doors to clients nine months ago. The key here is scale. By poaching a huge number of transactions and reaping 2.75 percent of every sale, the company needs to consistently grow it’s user base to move toward profitability. The numbers look good so far.

3) The writing on the wall. Your head is planted firmly in the sand if you’re not convinced that credit cards are going the way of the dodo bird. In fact, I’d argue that it’s not just your head that’s buried in sand; it’s your torso, midsection, legs and feet, too. The smartphone is transforming into a mobile wallet. Every major credit card company in the world has started forays into the mobile payment processing realm and few have made it as simple as Square.

Merchants get their card readers for free. They pay no monthly fees, and they can use it as little or as often as they like. In fact, we might even use it to give our friends a few bucks for the cab we’re sharing one day. If Square can keep gobbling up marketshare while PayPal, Visa, Mastercard and others are still scribbling on whiteboards, they’re either going to IPO or get bought out. And either scenario will likely be a boon for shareholders.

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