Thats really hard to predict all the time. ICO's can be very attractive and legit at the first step or glance but they might be worst in the next step.I mean to say. we might just suggest you any ICO which looks legit, perfect and breakthrough right now but who knows what will happen to them in the time to come. From my side I will tell you to look into Swiss alps mining. Somehow they are mining based ICO and still legit for one thing, they are having their project already running and up. They are just behind the scale up process and I guess its worth investing in such project. They can give us quick bucks.