Elite Trainer Boxes from Pokémon are becoming popular for investment and trading. They contain valuable items like booster packs and exclusive cards, which can appreciate over time. Collectors seek sealed ETBs for their rarity and potential profit. When investing, it's crucial to keep them unopened and in pristine condition. Monitoring market trends and understanding demand can help in making informed decisions. Trading ETBs with other collectors can also enhance a collection's value, making them a versatile asset.