Stacks (STX) coin

Salam

I am looking at a coin called ‘stacks’ (stx) , it basically lets you earn btc just by holding the coin. Stacking is locking your STX temporarily to support the network’s security and consensus. As a reward, you’ll earn the Bitcoin that miners transfer as part of Proof of Transfer.

Could you tell me if this is permissible please?

Jazakhallah