IEOs are way more secured than ICO. ICOs today are just Moneygrab scheme. I don't waste my time on ICOs because they just can't afford to land it to decent Exchange. iEOs can be easily a successful crowdfunding because tokens are easily sold out. But not all IEOs are successful tho. It's because the Exchange they conducted IEO was not a huge Exchange at all. So always buy on reputable Exchanges like Binance or Kucoin.