I wasn't sure what my and was gonna be but after I read so many replies, I think u should hold, btc is but a concept and as long as people believe in it (as they do now) its value will rise.
There is no risk in holding your bitcoin for a long time because it's value is increasing everyday and hold your bitcoin is very helpful for big investors so all investors trust bitcoin by it's unique features .
Everything we do there must be a risk and no exception with holding bitcoin in a long period of time. Although today, bitcoin price tend to rise, but there is no guarantee that the price will continue to rise in the future.