Girls and Boys !
Your calculations does not take into account that thing that UNTIL the whole markets are banned you are earning 10x in every month with ASICS so it really does not matter do you get 50% back (or even a bit more) from your initial investment when the game ends.
ASIC miner just throws the worthless ASICs to a trashbin and walk away 9x richer than GPUs owners...
Problem is: nobody sells to you a money making machine at a good price
Nobody is making 10x with ASIC except from PR users paid in machines delivered on time, to do promotion
GPU is still here for a reason
