I don't know anything about COB and had to look it up on coinmarketcap--is that what's considered an IEO?  In any case, it makes me shiver when people hype coins like BNB, because the performance of coins like that are completely dependent on how the underlying exchange is doing, and if the exchange goes bust so does the coin or token.  It doesn't look like Binance is going to go bankrupt or pull an exit scam anytime soon, but you never know with any of them.

As far as Cobinhood is concerned, this really looks sketchy.  I'm not sure why they'd have to freeze all their customers' assets for a month while they do some audit, nor did they give an adequate explanation as to why they're shutting down.  The only good reason I can see for a solvent exchange to shut its doors is to pull an exit scam.  Nothing else makes sense to me.

It'll be interesting to see if people are able to pull their money out in a month.  I'll definitely be paying attention to that.