How does bitcoin change?

Change comes from the way Bitcoins are spent. To spend a certain number of Bitcoins, you must pull in Bitcoins from transaction outputs to accounts you control. Note that in the spending part, it doesn't matter what address this is or what account that address is associated with.

Is bitcoin switching to a less energy-intensive approach?

Pressure on Bitcoin to switch to a less energy-intensive approach is coming from several directions. Ethereum, the No. 2 cryptocurrency, is switching from proof of work, which Bitcoin uses, to proof of stake, which requires much less computing power and therefore does less damage to the environment.

Should you invest in Bitcoin?

With all the hype, many people are wondering if they should invest in bitcoin. But the cryptocurrency also creates a wide array of concerns: Some worry that bitcoin is a bubble, too risky to invest in or susceptible to fraud, to name a few. CNBC Make It spoke to bitcoin and fintech experts about the common concerns surrounding the cryptocurrency.

Is bitcoin a bubble?

But the cryptocurrency also creates a wide array of concerns: Some worry that bitcoin is a bubble, too risky to invest in or susceptible to fraud, to name a few. CNBC Make It spoke to bitcoin and fintech experts about the common concerns surrounding the cryptocurrency. Is bitcoin too risky for the average investor?