Ever sold crypto at a loss, then bought it back days later hoping for a bounce? Watch out for the **30-day rule** 🚨

Here's the trap: If you sell an asset and repurchase the same one within 30 days, tax authorities won't let you claim the loss. Instead, they'll use your NEW purchase price as the cost basis for your original sale.

Why? It's called the **wash sale rule** (or "bed and breakfasting" in some countries). Designed to stop people from gaming tax deductions.

**The takeaway**: If you're harvesting losses for tax purposes, you need to wait 31+ days before buying back. Or grab a different asset in the meantime to scratch that trading itch.

Know your local tax rules though—this varies by jurisdiction.