First the developers, I don't invest in altcoins with anonymous team behind them. Been there, done that. It's recipe for disaster and in most cases it's a scam. Second good whitepaper, good design of the site. If the website is lagging because there is big quantity of information on the first page, the devs are noobs. If the website is lagging from the hosting services, the devs are cheap and this means that they don't believe in their project. Third is the total supply of the coins and if there is hard cap or soft cap. Is there a reason for the number of the tokens? If there is hard cap at 2 trillion tokens this is too much with the exception for projects like kin, trx and similar which are expecting over 600 mln users. Always read the whitepaper if the devs are issuing 50 mln tokens but are reserving for themselves 40% of the total tokens. Expect a big dump after the ico. And always invest in project in which you believe.