Personally, when I invest/spend/sell my Bitcoin. I always base it on the USD Price at the time.

Some people think it this is flawed but honestly if I didn't Invest in Lab Rat Mining I would have likely sold the coin anyways. Everyone wants to play captain hindsight in these situations which is fine but I consider myself a realist and in reality everything was bought at the USD level simply using bitcoin since Lab Rat had to buy the equipment in USD but just paid using bitcoin.

So for myself I am happy that I have made a profit already from LRM in terms of USD and still own shares and still have all of these large quantities of hardware coming in.

I'm just stating this as my opinion, there will be others that try to argue that you put btc in so you want btc + some out which I still believe will happen but this is a growing mining bond so for that to happen it is going to take time. (Around 1 year was my initial assessment at the very least). I'm personally happy so far with the returns.