What are some valuable tips for collecting and investing in Pokmon cards, especially those featuring the keyword "Pokmon cards ex"?

When collecting and investing in Pokmon cards, especially those featuring the keyWord "Pokmon cards ex," it is important to research and understand the market trends. Look for cards in good condition, consider the rarity and demand of the card, and be cautious of counterfeit cards. Additionally, consider diversifying your collection and investing in a mix of popular and lesser-known cards to potentially increase your returns.