The cryptocurrency market is unregulated and makes it excessively prone to pump and dump, and other strategies of manipulation. We also have a overheated market with lots of people jumping in hoping to make a big gain with little effort. Historically we know that we have all the components of a bubble, and speculative behaviour can change perception with a single rumour. When a bubble bursts, by definition transactions collapse. You will not be able to move in the market, no one will want to buy. When the dust settles, quality tokens will continue to function because they have a use but the "me too" cheap cloning projects will evaporate with the backers.