Where do you buy Monero?
I'm on yobit but then I don't see monero on thier list, people in the trollbox don't know why either. Which exchange do you see monero being paired with btc?
Use Bittrex that are very good exchange. Probably most secure of all alts/btc exchanges.
I have 2 years experience with them and i'm very satisfied.
Also you can use Poloniex they have even parity Monero /LTC and others.
But if you want to learn more, try on their official announcement page.