i am rephrase the question
if i am wait for the cost per mhs is going up is ok to sell it?
if i am sell now for insta btc is good to invest in site like btc jam or similar?
Cost per MH will only go down as time passes. New technology. Look at past price per MH you will not make money off of.
You can sell now yes. It is not "insta" btc. You have to find a buyer who you can trust.
Now investing in btc jam or any other investing is separate.