I'm still trying to understand this concept about "Blocks" and "Blockchains."
Are Blocks just digital records of transactions that need to be processed before they get approved and the Bitcoin changes hands? Is Mining lending your computer power to process these Blocks?
Pretty much, give or take a lot of technical detail.
I see. Why is mining becoming more difficult and less profitable?
Why are huge, commercial-like facilities needed for mining when it used to be possible to do it on a laptop?