Bitcoin solved the double-spend problem. The key problem was payment confirmation without central clearing. Bitcoin's solution was ingenious but wasteful - it's fairly slow, and you can't put other things on it.

I view Bitcoin as the more democratic version of money and value transfer because no one controls it... I expect the Internet to be around longer than any nation-state, so a nation-state-backed currency is actually less safe than an Internet currency in my mind.

What Bitcoin started is metamorphosing into something bigger: a 'crypto-tech'-driven economy with its own value creation, not unlike the Web's own economy. Welcome to the cryptoconomy.

I want to help create the world's first global currency built on the Internet and built on open platforms and standards such as Bitcoin, and I want to build a financial services institution on top of that. That's what I'm doing with Circle.

We dealt with a lot of skepticism early on, when we first spoke about bitcoin.

The rudest possible gift is a gift card. It means you think the person is stupid and has no interests. The only good gift card is Bitcoin. You practically have to be a hacker to know about it.

I invested in bitcoin - was that because of my degree? I don't know.

We think of bitcoin as mobile. It's not one company; it's broad.

Bitcoin will experience many bubbles along its way to improving the lives of everyone on the planet. I'm not concerned with the short-term price fluctuations.

I'm motivated by the positive ways in which Bitcoin use being widespread will make the world a better place.

Through decentralized cryptography, Bitcoin eliminates the need for banking intermediaries, significantly lowering transaction costs, and could liberate poverty-stricken economies around the globe by providing access to capital to the one-third of humanity that is excluded from the financial world.

One of the things that has plagued bitcoin is not bitcoin itself but the companies built on top of it.

Within the coming years, disrupting the Bitcoin network will become increasingly more difficult as Bitcoin wallet software and the protocol become more mature and resilient.

I think examples of free market transactions between peaceful people using Bitcoin and the Internet, I think it's a wonderful thing. It's going to make the world a better place.

I've been through a lot of moments when other people thought Bitcoin was going to implode, and in those instances, I generally have seen through inaccurate coverage of it.

Bitcoin is inherently international, and one of its great promises is it enables cross-border payments in a more efficient way.

Bitcoin woke us all up to a new way to pay, and culturally, I think a much larger percentage of us have become accustomed to the idea that money no longer comes with the friction it once had.

Most people heard about Bitcoin for the first time in the context of the Mt. Gox collapse. It is our Lehman Brothers.

Think of Bitcoin as a bank account in the cloud, and it's completely decentralized: not the Swiss government, not the American government. It's all the participants in the network enforcing.

People bought bitcoin because they thought it would be worth more tomorrow. And a lot of people got lucky. But we're not seeing real people use bitcoin. And we don't know what problem it solves. Now, blockchain, I think, is a genius advancement in technology.