To Convert or Not to Convert

Well i have enough Ethereum saved up from mining to purchase about 40 new Sapphire RX 480 8gb cards.

I am on the fence about it i should just hold the ETH like i planned to do or add to my current mining rigs.

I know i would not make the eth i spend back by the time of POS, but i will have the hardware for other coin mining or i can sell.

Let me know what any of you would do