Cardano(ADA) and or EOS CAN be good investments. But it's not guaranteed that they will end up being good investments. Take note that Cardano and EOS doesn't currently have working products(correct me if I'm wrong), so it's a lot more riskier(in my opinion) because you're investing on something that's just merely a whitepaper, so you're pretty much just investing on their ideas(though I'm not saying that this is necessarily a bad thing).
Again, both CAN be good investments, IF they actually successfully get their shit done.
I did read about the Founder of both Cardano and EOS, they are both with the same company before establishing their own companies and crypto's but on technical aspect I don't have enough knowledge on it. I initially invested in Cardano because of their visions and activities. Yes you're absolutely right! Investing on their ideas. hhmmm I hope it goes well.