I'm wondering what the symbol is or if I am even able to get historical price data on BTC, ETH, etc. denominated in United States Dollars. 
right now when if I'm making a call to client such as: 
Client.get_symbol_info('BTCUSD')
it returns nothing
Does anyone have any idea how to get this info?  Thanks!
You can not make trades in Binance with dollars but instead with Tether(USDT) that is a cryptocurrency that is backed 1-to-1 with dollar.
To solve that use BTCUSDT
Change BTCUSD to BTCUSDT
Binance API: how to get the USD as the quote asset