It really depends on the cost of electricity where you live, if you were to mine here in the UK with a 6 GPU rig you'll be just about making a profit. Personally I prefer to mine burstcoin using old HDD's, if you have a terabyte or two of storage you'll make a half decent income, without the need to run multiple expensive GPU's.
The PoC (Proof of Capacity) algorithm has great potential as far as furthering the idea of decentralisation for cryptocurrencies.
If you haven't already check it out! https://web.burst-team.us/
Oh wow, thanks a lot. I never thought that Burst was a good coin though, but if it is an excellent alternative, why not. . .
The only thing is it's not even a 10% as profitable as GPU mining, it seems
I do agree the mining rate is slow however if you have a cheap source of hard drives it can be profitable in the long run as it is only a one cost (Unless of course the unlikely event of hard drive failure, which can often be resolved for free if you have warranty on the drive).
It may not be as profitable but it is definitely a cheaper alternative for people who have little investment so far in blockchain technology.