I think the most important is for the coin or token to actually have a use case or product, otherwise, it's just another decentralized coin that you can trade and we already have them in the market.

But, I think IEO is better than ICO, because to me with ICOs there are lots of scammers and from my experience, it is very hard to prove or be sure in the legitimacy of the project.
But with IEO there are procedures a company has to go through before the launch and it kind of gives me the courage to trust these projects a bit more.
For example, the https://yanu.ai/ IEO is trustworthy and they have a very nice Candybox campaign for token holders, a real product with a real-life use case