A few hours ago, a sharp drop on the markets sent the price of Bitcoin below $13,000 again, after which it seemed to rebound. All top 10 alts are showing significant losses, apart from Ripple, which trends higher.
One potential cause may be an announcement from South Korea about stricter regulations towards the crypto currencies market, as noted here by Reuters. But although this news mentioned a Thursday statement of the South Korea government, much of what it says has been repeated before, in previous statements. Bitcoin continues to trade higher than everywhere else on Bithumb (a South Korean exchange), still driving the price up.
The drop may also be correlated with the news about Segwit2x being adopted today.
SBD was trading, at the moment of writing, at $7.61 (after going as low as $7.21) and STEEM at $2.83 (with a low of $2.79).
Although markets rebounded in a matter of hours, it doesn't look like it's completely off the hook, no trend formed so trading still seem to follow news (and rumors).
Unfortunately, I was asleep during this cough so I couldn't do anything, but congrats to those who bought this dip!
I'm a serial entrepreneur, blogger and ultrarunner. You can find me mainly on my blog at Dragos Roua where I write about productivity, business, relationships and running. Here on Steemit you may stay updated by following me 
You can also vote for me as witness here:
https://steemit.com/~witnesses
If you're new to Steemit, you may find these articles relevant (that's also part of my witness activity to support new members of the platform):