Any ICO from a newly formed company is entirely at risk. An ICO from Kik or Telegram is different to an extent in that there is already an entity behind it.
Of course if there were no "blockchain" they would simply issue tokens like everyone has in the past, where you exchange money to get a token, that you can use in the app, and that token is locked into that app. So you can't use it elsewhere, but it still has some value as long as the app and users exist since you can sell your tokens to other people if you no longer need them, assuming that transferring of tokens is allowed / acceptable.
But then it wouldn't be block chain, and it wouldn't get any hype =]
Games have been using this for years and years, so there's really no difference here.
One side likes to point out the internet bubble, the other side likes to say well look at the internet now. What's missed though is the massive companies that were built in the middle, that really changed our daily lives. Amazon, Google, Facebook, Apple, etc, these companies changed how we live our lives and then Banks and everyone else realized the benefits of offering connected services directly to a PC or a phone and again there were tremendous benefits to consumers and end users.
At the moment, there is no benefit, outside of a large remittance and some tax avoidance that can be accomplished through cryptocurrency, and certainly there's no functional product company in the crypto space, outside of the exchanges which make money through people simply trading currencies, but returning no real value back to the world.