Absolutely, diving into eWallet app development with a focus on cryptocurrency is quite the adventure! Here’s a chilled-out roadmap to get you started:

Learning the Basics: Make sure you're tight with the concepts of both eWallets and cryptocurrencies. It's like knowing the ingredients before you bake a cake.

Tech Stack Selection: Go for languages and frameworks that are robust and scalable. Think Node.js for backend, React or Flutter for cross-platform app development, and don’t forget blockchain tech like Ethereum for smart contracts.

Cryptocurrency Integration: Look into APIs like CoinBase Commerce or BitPay for handling crypto transactions. They’re like the middlemen making sure your crypto dealings are smooth.

Security First: With crypto, security isn’t just a feature, it’s the backbone. Implement features like two-factor authentication, encryption, and maybe even hardware security modules if you’re feeling fancy.

User Experience (UX): Keep it simple. The world of crypto can be intimidating, so a user-friendly design can be your app's best friend.

Compliance and Legal: Don’t skip this! Make sure you’re up to speed with regulations in the territories you plan to operate. It’s a bit like checking the weather before you head out.

Testing and Feedback: Test your app with potential users. Their insights are like gold dust for refining your app.

Continuous Learning: Stay updated with the fast-paced world of crypto and eWallets. Joining developer communities can be super helpful.