ChainCatcher news, the German Digital Assets Company (DDA) has partnered with Heliad Crypto Partners to launch the DDA Heliad Dynamic Blockchain ETP (HELI) on the Börse Stuttgart, Germany's second-largest stock exchange.This new exchange-traded product (ETP) offers investors dynamically adjusted blockchain tokens, up to 13 types. The DDA Heliad Dynamic Blockchain ETP provides a new approach to cryptocurrency investment by tracking a dynamic index of leading blockchain tokens.