RBTC, also known as Rootstock Smart Bitcoin, is a cryptocurrency that is built on top of the Bitcoin blockchain. It is designed to provide a platform for smart contracts and decentralized applications, similar to Ethereum. However, unlike Ethereum, RBTC is fully compatible with the Bitcoin network, which means that it can leverage the security and stability of the world's largest cryptocurrency.

One of the key features of RBTC is its use of merge-mining, which allows Bitcoin miners to simultaneously mine RBTC without any additional hardware or energy consumption. This means that RBTC can benefit from the same level of security as Bitcoin, making it a more reliable and trustworthy platform for smart contracts and decentralized applications. Additionally, RBTC is designed to be highly scalable, with the ability to process up to 100 transactions per second, which is significantly faster than Bitcoin's current transaction speed. Overall, RBTC offers a promising solution for those looking to build decentralized applications on top of the Bitcoin network.