It's a combination of the cosmwasm (Rust->WebAssembly:https://github.com/CosmWasm/cosmwasm https://github.com/CosmWasm/cosmwasm) library being popular for writi

It's a combination of the cosmwasm (Rust->WebAssembly:https://github.com/CosmWasm/cosmwasm https://github.com/CosmWasm/cosmwasm) library being popular for writing smart contracts, and the Rust specifically being chosen for its great type safety and error tooling, which can help people writing smart contracts to better guarantee the behavior of their smart contracts ahead of time. This is important because once it's deployed it's essentially a bounty program with a direct payment mechanism for the entire value of the funds that the smart contract can manage.