I am thinking about mining Monero (cryptonight R). I have 3 290x gpu's. My electricity is about 12 cent. As far as I can see profitability will be weak to say the least, should I wait for Monero to rise in value or would the hashrate kill of profitability anyways??
I had a 290x for years and sold it on to make way for vega56. Even with your cheap electric you will be mining at a loss on current prices. Should XMR rise to over £60 you may get to cover the electricity cost, you are likely needing something near to 2x before those cards will yield any profit.

So what you are basically saying is that I should sell them on Ebay or something. Don't think they will be worth much, so not sure I can be bothered to sell. Think I'll keep them in hope of cryptoprices exploding some day.