^ not yet there is still 5,000 pending transactions. If it reaches to 100 or even 10 a lot of investor would be happy because their transaction is now cleared out.
Those will never clear.
Some of them are huge spam tx that would fill a block.
But browsing around this one is pretty interesting:
https://blockchain.info/address/1EEqRvnS7XqMoXDcaGL7bLS3hzZi1qUZm1And it seems it's owned by hitbtc , and look at the queue
During Christmas Bitcoin was sailing in ATH territory and many people were moving Bitcoins, either to buy or to sell them. Now that the market is depressed most of the people hodl and don't move coins - this explains the empty mempool.
That is not an answer for it as the mempool was full 3 months before Thanksgiving not Christmas.
I tend to think that the reason it dropped is small exchangers switching to segwit and increasing the batch payments size and Coinbase also not doing 2 output transactions anymore.