Answer: ATL BTC is a shorthand for the cryptocurrency pair of Bitcoin (BTC) and Atlant (ATL). Atlant is a decentralized platform for real estate ownership, rental, and investment. It is a blockchain-based platform that allows users to securely store and manage their real estate assets on the blockchain. Bitcoin, on the other hand, is the world's first and most popular cryptocurrency. It is a digital currency that can be used to buy goods and services online, as well as to make payments to other people. The two cryptocurrencies have been around since the early days of the cryptocurrency space, with Atlant being launched in 2017 and Bitcoin in 2009. Both cryptocurrencies have seen significant growth over the years, and they continue to be popular choices for investors and traders alike.