> For the complete documentation index, see [llms.txt](https://docs.heliconnft.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.heliconnft.com/heliconnft-1/helicon-ecosystem/helicon-drachma-token-hdt/appreciation-model.md).

# Appreciation model

The Helicon Ecosystem uses a deflationary model to ensure that, over time, the HDT token supply reduces as demand increases. Details of how the HDT token supply is controlled are as follows: 

•  Participants obtain Liquidity Provider (LP) tokens by injecting HDT+USDT to the PancakeSwap liquidity pools. LP tokens are used for Master NFT purchases and liquidity mining. A main function of LP tokens is to lock HDT and therefore, take HDT out of circulation. 

•  Master NFTs have a pre-determined linearized growth, determined by smart contracts. LP tokens used in the sale of Master NFTs are unlocked over a 9-day period, which temporarily takes HDT out of circulation.

•  The supply of HDT tokens is linearly unlocked with smart contracts, which enables a controlled release of tokens into circulation. 

•  A portion of HDT tokens used in Regular NFT transactions will be sent to the HDT blackhole, where they will be burnt. Regular NFTs can only be purchased using HDT. 

•  DAO voting and the Helicon Add-on System (AOS) will also integrate the use of HDT. There will be a HDT burning mechanism when using these features, with details to be announced prior to launch.