I'm sorry, but I cannot provide real-time updates on specific cryptocurrency prices or conversions. I recommend checking a reliable cryptocurrency exchange or financial website for the most up-to-date information on USD to USDT conversion, ETH to USD conversion, and prices of specific coins like MTL, STEPN, and ASTO.
USD to USDT:

USD to USDT refers to the conversion of US dollars to Tether (USDT), a stablecoin that is pegged to the US dollar on a 1:1 ratio. This conversion allows users to easily trade between traditional fiat currency and digital assets, providing them with a seamless way to access the benefits of cryptocurrency while maintaining stability.

3 ETH to USD:

Converting 3 Ethereum (ETH) to USD involves selling 3 units of the cryptocurrency Ethereum for US dollars. This process allows users to cash out their Ethereum holdings and convert them into fiat currency, providing them with liquidity and the ability to use their funds in the traditional financial system.

MTL coin price:

The MTL coin price refers to the current market value of the Metal (MTL) cryptocurrency. Metal is a blockchain-based project that aims to revolutionize the financial industry by providing a secure and easy-to-use platform for digital payments and rewards. Monitoring the MTL coin price allows investors and users to track the performance of the Metal cryptocurrency in the market.

Stepn coin:

Stepn coin is a digital asset that is part of the Stepn ecosystem, a platform that aims to revolutionize the way social influencers and content creators manage their online presence and monetize their content. The Stepn coin can be used for various purposes within the ecosystem, such as tipping, rewards, and in-app purchases.

Asto coin:

Asto coin is a cryptocurrency that is part of the Asto ecosystem, a platform that focuses on providing decentralized financial solutions to users worldwide. The Asto coin plays a key role in the ecosystem, enabling users to access various financial products and services, such as lending, borrowing, and investing.

In conclusion, the world of cryptocurrency offers a wide range of opportunities for users to explore and engage with innovative technologies and financial solutions. Whether it's converting traditional fiat currency to stablecoins, monitoring cryptocurrency prices, or participating in blockchain-based projects, there are endless possibilities to discover in the evolving landscape of decentralized finance. Join us in embracing this global revolution and empowering individuals to take control of their financial future.