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.