People talk about the resale value separating GPU from FPGA/ASIC. 
Much more important is the divide between GPU/FPGA vs ASIC when it comes to reprogramming.

P2P Crypto currencies are here to stay, Bitcoin, Bitcoin 2.0 or something else. They will need hashing power.
I will spend my money building general purpose computing power since profit maximizing isn't what drives me.

Sure I might buy some ASICs too at some point but knowing that it's betting on just one horse.
Even bitcoin might change algorithm if threatened.
Being future proof is worth something even to non-idealists hedging in the market.