Right now bitcoin price increase is getting continued for a long time. This gives every user an added profit. Bitcoin grows gradually, which describes that holding doesn't have any specific time. Everytime holding is effective.
Yeah for this time i think holding bitcoin is very good because there is some people predict that for this year bitcoin will halving.
As long as the price rises in the long term, it is better to hold. If you hold since 2012, your wealth has increased many times.
Well we can't all be holding until forever. That would mean that the supply will be stagnant and no one will be able to buy anything if everybody just held. And the very moment one person sells his bitcoins, then the price will dip really bad. So I think if everybody only held bitcoins and not use it, then it'll be bad and it might kill bitcoins.