I don't know, I listened to the entire thing and it seems like a legit concern - [link](https://www.irs.gov/newsroom/final-regulations-and-related-irs-guidance-for-reporting-by-brokers-on-sales-and-exchanges-of-digital-assets) - not providing a way to tell brokers/exchanges your true cost basis could have a significant and unexpected impact on future capital gain/loss calculations. Losing the ability to do cross-wallet 'specific identification' for cost basis determination seems like kind of a big deal to me, but YMMV. 🤙🏻