This multi-cryptocurrency line chart visualizes the daily closing price of Bitcoin from 2013 to 2021, using a smooth curved line to show price trends over time. The chart includes labeled axes, gridlines, and a bold title, with data loaded from a CSV file hosted on GitHub. Built with D3 v6, the visualization uses `d3.csv`, `d3.scaleTime`, `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, and `d3.line` with `curveBasis` to render the SVG path.