BMX is an ERC20 based token issued by BitMart Exchange with total volume of 1,000,000,000. First issued as BMC in December 2017, BitMart changed the name of the token in January 2018 as BMX. You may find that the symbol name displayed in the smart contract and block explorer as BMC, but the actual symbol name we use is BMX. The reason is: our toke was named BMC, but then we find that 'BMC' has been used by another project, so we have to change the symbol name of our token to 'BMX'.
BitTorrent was initially conceived by Bram Cohen, a peer-to-peer protocol for users to transfer files around the world. The BitTorrent Token (BTT), a TRC-10 token is created on top of the TRON blockchain platform as a way to extend the capability of BitTorrent. The token is added to introduce some economics feature on BitTorrent for networking, bandwidth, and storage resources to be shared and tradeed. Some of the other feature that BitTorrent Token (BTT) offers would be BitTorrent Speed. This is whereby BTT tokens can be big in exchange for faster download speed. List of exchanges trading BTT token can be found at https://www.coingecko.com/en/coins/bittorrent/trading_exchanges