However, there are a few things to consider:
* Decks need balance: While it's possible to build a deck with only Fire-attribute monsters, it's unlikely to be very effective. A good deck needs a mix of monsters, spells, and traps, and ideally, different attributes and types to cover various situations.
* Opponent's strategy: If your opponent knows you have a Fire-heavy deck, they might bring cards specifically designed to counter that. This could make it difficult for you to win.
* Fun factor: Playing a deck solely based on one attribute might feel repetitive and less engaging compared to having a more diverse deck.
Ultimately, you can choose any cards you like for your deck. However, remember that building a well-balanced and diverse deck will give you a better chance of winning and make the game more enjoyable for both you and your opponent.