In order to explain bitcoin to investors, we are offering a series of blogs and podcasts. A previous blog tried to explain the developments driving bitcoin’s rally. This blog is the first in a series that covers topics that are important to investors. For more on this topic, please listen to the The question “what is bitcoin?” can be answered in many ways. I don’t think investors need to know how bitcoin works technically, but they need to be able to assess the opportunities and risks of investing in bitcoin. So let us examine the two biggest questions that investors care about. First, how sure are we that bitcoin’s supply won’t increase beyond what is planned. And second, will the technology continue to work?