BigInts are important for a myriad of mathematical, financial, scientific, and timing applications (such as in the Node.js process.hrtime.bigint API), and they have been therefore a valuable addition ...
𝗕𝗶𝗴𝗜𝗻𝘁: 𝗛𝗮𝗻𝗱𝗹𝗶𝗻𝗴 𝗟𝗮𝗿𝗴𝗲 𝗜𝗻𝘁𝗲𝗴𝗲𝗿𝘀 𝗶𝗻 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 JavaScript numbers have a limit. Precision fails after 2^53 - 1. This breaks financial apps and cryptography.
All values are stored as BigInt in the smallest currency unit (cents, paise, satoshi). No floats ever touch the internal representation.