What is BitCoin?

We need to understand something.

Bitcoin:
Market Cap: $ 278,827,000,000
Market Cap: $ 219.918.732.574

As of 24-Hour Transaction Volume: $ 19,729,900,000

There is a discrepancy between the 24-hour trading volume and the changing market cap. If you are working with the Coin stock supply / demand balance - which we know / think we are - things we do not know or things we do not see are turning.

How is it that there is $20 billion in transaction volume and$ 50 billion in depreciation? - This depreciation is higher when there are less volumes during the day -

Do I think wrong? What is this job really? Are there any financiers who can explain that between us? Thanks in advance,