JavaScript Mastery from Zero to Hero - Prepare for Coding Interviews - Solution - Update Cryptocurrency Profile Data

The video tutorial guides viewers through creating and modifying a JavaScript function called 'crypto portfolio'. Initially, the function returns an array of cryptocurrencies. The tutorial then demonstrates how to log the function's output and modify it to return only specific elements using the 'slice' method. The instructor encourages viewers to practice and understand the slicing technique, emphasizing its power and utility in JavaScript programming.

Explain how the 'slice' method is used in the context of the 'crypto portfolio' function.

What is the significance of the array elements 'Bitcoin' and 'Ethereum' in the exercise?