PANews reported on December 17 that according to Grayscale's official news, Horizen ($ZEN) completed its last block reward halving, which marked a major transformation of the project's token economic model. The new model will no longer halve, but will adopt a gradually decreasing token issuance rate. At the same time, Grayscale Horizen Trust provides qualified certified investors with investment channels for $ZEN without the need to directly purchase or store tokens.