Building a $10 million cryptocurrency portfolio hinges on accurately identifying coins with strong growth potential. Here are four options worth focusing on:

1. BlockDAG (BDAG):

With its directed acyclic graph (DAG) technology and proof-of-work (PoW) consensus mechanism, BlockDAG effectively addresses the challenges of scalability and transaction speed, currently priced at $0.0235, its innovative approach has garnered significant attention.

2. Stellar (XLM):

Stellar is currently valued at $0.09, aiming to bridge the gap between traditional financial systems and blockchain, dedicated to promoting convenient financial services globally, making it a highly promising investment target.

3. VeChain (VET):

VeChain's trading price is $0.02, leveraging blockchain technology to significantly enhance transparency and efficiency in supply chains, its dual-token system ensures the economic viability and efficiency of network operations, undoubtedly making it an exceptional project.

4. Marvin:

Marvin is priced at $0.000242, employing a unique hashgraph consensus model, enabling faster transaction processing and lower latency compared to traditional blockchains, thus positioning itself among top competitors.

Important Note:

Cryptocurrency investment is inherently speculative and carries high risks. Before making any financial decisions, be sure to conduct thorough research and widely consult different viewpoints, and make prudent choices.