You said you've been holding your eth since it was 1,300 or so, within that time and now there have been times when it surpassed that amount and if you had sold then, would have given you profits, no matter how small. The goal of investment is indeed profit as you know, but selling it right now, you're surely incurring nothing but losses.
If you're a believer in long term investment, as you said, then you should continue holding your eth, at least till it reaches the price you had initially bought it for, and if so kindly surpass it, just do not sell when you'll be on the losing end, it's bad business(investment), except of course you can't do without the ROI right now.
I appreciate your respon but to answer to one of your question in your first paragraph I will say the market value of ethereum has never increase more than $1,300 since the time I have been holding my ethereum. I don't want to sell at lose and that is the reason why am still holding just that am currently losing faith.