This example visualizes the historical price of Bitcoin from December 2017 to August 2020 using a line chart. It loads data from the CoinDesk API, parses the JSON response into date-value pairs, and renders a time-series line with axes. Built with D3 v5, the chart uses `d3.scaleTime`, `d3.scaleLinear`, and `d3.line` to plot the data, while `d3.axisBottom` and `d3.axisLeft` generate the axes. The SVG output is styled with a minimal, full-screen layout.