Well people do always says to hold bitcoins. But for me it would take you to a very long process. This maybe the safest way? Maybe yes or who knows. Some do trading pro traders actaully gaining profit and i think it is enough yet much risky than just holding
Holding is good but you can sell it any time when you see higher price and secure profits from it, as holding for long term can be risky as we don't know whether price will lower or higher in future.
Right , when you see that the price is good for you to make a good profit , withdraw your BTC.