This reusable D3 scatter plot visualizes cryptocurrency market capitalization against 24-hour trading volume for ten major assets, with circle size encoding market dominance percentage. It uses logarithmic scales for both axes to accommodate the wide value ranges, while a square-root scale maps dominance to circle radius. The chart is built as a reusable factory function following the Bostock pattern, utilizing D3 v7's `scaleLog`, `scaleSqrt`, `scaleLog` APIs, and feature-based selection for efficient SVG updates. The code includes data parsing via `d3.csvParse` and `d3.autoType`, with hover tooltips displaying asset-specific details.