How long is BTT valid?

Excuse me, I'm curious about the lifespan of BTT tokens. In the realm of cryptocurrencies, the validity and lifespan of tokens can vary greatly. Some tokens have indefinite lifespans, while others may have expiration dates or conditions for redemption. Given the dynamic nature of the crypto world, I'm wondering if BTT falls into a specific category in this regard. Is BTT a token that remains valid indefinitely, or are there any specific conditions or time frames that need to be considered? Thank you for your insight into this matter.