Hi. I drew a few graphs for myself and wonder if they could be useful for somebody.
Bitcoin mining cost (self-cost) from the beginning of time to 2013.02
the ASICs era: from 2013.02 to now
Litecoin mining cost (self-cost)
Bitcoin mining profitability from the beginning of time to 2013.02
the ASICs era: from 2013.02 to now
And this is the right bottom corner or the graph above.
What's more profitable for GPU: mining litecoins or bitcoins?
See
http://divananalit.org for more information.