So I'm thinking of cashing in some of my BTC, to the tune of $900 and buying 4x RX 560 4GB cards to mine Monero, or even possibly Ethereum (or ethereum classic depending on whichever is a better investment...) Each card should get a base hash rate of 350h/s.
Mining calc tells me that it's $80, with current difficulty and price, a month, on the cards alone (mining Monero).
So is it a good idea to buy them and try my luck with gpu mining or keep the bitcoin and hope the price keeps going up?

Hi, I've just setup a new pool in US for Sikka.
Please go to: http://sikka.zigtee.com 
Pool fee is 0.5% only

how to sync wallet?

First of all, its abortion, you calling it a word with a bad connotation to persuade people is subversive
Second of all "fair" is not a concept found it nature, and just exist in your imagination

Which pool are you mining?
What is your hashrate?

Thanks bud - I already use that and counwarz to work out current mining profits

I'm thinking more like underground speculative coins - with low current technical profitability chance to breakout to the upside - mine, hodl, sell, repeat style