[mannykannot]

If you, personally, do not care what the exchange rate between Bitcoin and USD is, then maybe you need not be concerned over whether a Tether bubble is going cause that rate to crash. I guess, however, that a large majority of those holding Bitcoin care a good deal about that rate, and if so, then a crash in that rate will have a significant effect on how Bitcoin is viewed and used. The question for you to ask yourself, then, is whether those changes will adversely affect whatever it is about Bitcoin that you value.