BTC sent in USD suddenly moves from $18 billion -> $317 billion overnight on no news?

Yesterday BTC did about $18 billion in USD sent, and today it did a whopping $317 billion, more than 16x overnight increase and 3x its previous ATH. There was no corresponding move in BCH on the same metric as has been seen with previous surges.

BTC price is slightly down, crypto overall a bit down.

https://bitinfocharts.com/comparison/sentinusd-btc-bch.html#alltime

Any theories or ideas why? Huge whales buying in or selling out? Will we be seeing a big announcement about crypto from a major government or corporation?