The first rule of writing about Bitcoin is: don't write about Bitcoin.
The story of the world's best known cryptocurrency is astonishingly fast-moving and its fans will soon line up to tell you you've got it all wrong.
But write about it we must, because the past 24 hours have been catastrophic for the grande dame of cryptocurrency - even by Bitcoin standards.
I'm going to concentrate on Bitcoin here - but if you're a crypto follower, you'll know the whole market is troubled, to put it mildly.
What's happening?
As I write this, Bitcoin is trading at $21, 974 (£18,000). It's fallen 25% in the past five days alone, to its What's happening to Bitcoin?lowest value in 18 months. Its peak of almost $70,000, in November, feels a lifetime ago.
source: https://www.bbc.co.uk/news/technology-61796155