The problem with that concept is that there is NO OVERCAPACITY in Bitcoin mining gear...
There clearly is overcapacity. That is why these miners are not selling.
Odd, I don't see S9 in stock on Bitmain on a consistent all the time basis, which WOULD indicate overcapacity.
They're STILL selling out every one they can make.
The ONLY units they're not selling out on are those old "relabled S7" things that are UNPROFITABLE for most folks because of their low efficiency by current standards.