I don't know about investing it Zilliqa, but the technical side looks interesting. Compared to the competition, Zilliqa at least has managed to implement some promising solutions, like sharding. By contrast, so far ADA and EOS are just hype and promises. It would be interesting to see how their sharding solution works in practice. On the downside, they have postponed the launching of their mainnet, with the explanation that they need more time for proper testing. Maybe they want to launch when the market is bullish, who knows. They also promise decent decentralization so I'm looking forward to following their progress.