Bitcoin is going crazy again according to the Coindesk index.
The price has essentially doubled off its recent lows.
Something to bear in mind when weighing up stock market cycles - alongside the traditional valuation measures - is to look for evidence of speculative activity.
And, yep, we've got it in spades!
Australia's stock market doesn't appear to be wildly overvalued, but the valuations for 'growth' stocks have often been very high, and as such more prone to a correction.
