
Bitcoin trading volumes today same as when the price was 11K USD

Nothing unusual about that really, its possibly a good thing. Maybe lots of people are starting to accumulate in this period of low price volatility.
But who's selling?

Selling? Are you kidding?
I have seen 19k+ but still held strong.
Yes but someone is selling. Volume is a bitcoin trading hands from one to another. I'm surprised there's this much volume at this low price at this point in the cycle.