In what where they thinking about when they started to super inflate Tether? it was supposed to be an altcoin who was going to be the opposite as the inflation, because they were always going to be at $1,00 each.
Bitfinex is fucked because of Tether.
But no, how the hell do you think that it is a bubble? it is not a bubble yet, and it is not going to explode because not even the 3,5% of the population has invested in bitcoin. It means that it is very impossible to see it going down, or even crashing, because there are no "big holders" just small holders like you and me, who have less than 5 bitcoins on our wallet.
I have never thinked about this, because it is just a theory and all those people who are saying that it is going to explode are the ones who does not even have 0.01 on their balances.