https://www.cnet.com/news/after-hitting-10000-yesterday-bitcoin-raced-past-11000/

When will the Bitcoin bubble burst?

The value of the digital currency topped $11,000 per Bitcoin early Wednesday, less than 24 hours after hitting $10,000. It's the fastest gain in valuation for any investment, ever, fueling fears that there's a lot of irrational enthusiasm for the currency, which still isn't widely accepted.