Its always a risk to hold your Bitcoins but the question is that it is worth or not.?
If you see the graph of BTC price then you will come to know that it has always increased from its previous top value from time to time, hold them till it reaches moon, simple.
Bitcoin is worth it there is no question about that.
Yes bitcoin is very risky investment we do not know what will happen in the future but if you do not want to take a risk just full out your bitcoin in your wallet since there is a bad prediction on segwit only risk taker will hold the bitcoin and i am one of those users because i beleived in bitcoin.