How many multiple algorithm coins are out there now?
It would most likely never be possible, but imagine a multi algo coin that used...
SHA 256- Support network via ASIC
Scrypt - Support network via ASIC
X11 - Support network via FPGA and GPU
BLAKE 256 - Support network via FPGA and GPU
Cryptonote - Support network via CPU / GPU
Momentum - Support network via CPU / GPU
It would be perfectly balanced from a mining perspective. You may say im a dreamer, but im not the only one