$1B is way too much for a cryptocurrency that only has a testnet. I'm not dismissing their tech, they have more information in their technical faq [1], they're basically promissing a better consensus protocol based on sharding that it's supposed to solve the scalability issues that currently exist in ethereum, but whether this is vaporware it remains to be seen. Implementation is far from complete, they don't seem to even allow people to run public nodes [2]

[1] https://docs.zilliqa.com/techfaq.pdf [2] https://github.com/Zilliqa/Zilliqa