Paxful is a peer-to-peer exchange for Bitcoin.
Currently, no other Cryptocurrencies are available for exchange in the market. (September 2017)
Although you can choose to exchange Cryptocurrencies such as Litecoin or Ethereum for Bitcoin.
To do this, you can simply make an offer in Paxful’s exchange to sell your Cryptocurrencies(other than Bitcoin) and wait for if anyone with Bitcoin accept to buy your fund with Bitcoin.
There are more than 150 forms of funds you can exchange for Bitcoin on Paxful’s exchange market.