Watching Crypto

There's some serious trading going on.
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HIGH VOLUME....
(I think)
Bitcoin is over 412 Billion market cap...going up
(make that $414 Billion...two Billion since I started writing this
Steem is almost to a Billion (986 million) ...going up.
Scratch that...it's passed the Billion mark...(since I started writing this)

One odd thing I noticed...BitCoin dominance isn't changing much...still about 38%...
what does that mean?

There is a LOT of trading going on...millions and millions of dollars are changing hand an hour...perhaps per minute.
Steem has $54 million an hour.
BitCoin is $11 BILLION an hour.
The total market cap for the entire CryptoSphere is approaching half a $TRILLION ,
$18Billion in the last 24hrs.

wonder what caused this to happen?

update: This
partially...I don't see why it would have affected BitCoin or the rest of the market.