Binance's trading pairs against USDT should be taken with a grain of salt. I usually don't include any USDT exchange because you don't know if the tokens are actually backed by dollars in a bank account or printed out of nothing.

I strictly focus on actual fiat exchanges like Coinbase, Bitstamp and Kraken. Both offer USD and EUR deposits which gives a better overall pic of the market. CME is also a very decent indicator with how there is basically no way to manipulate the volumes there. 

Top volumes last 24h;

CME $350 million.
Coinbase Pro $88 million.
Bitstamp $60 million.
Kraken $45 million.