I sell as an when required as i am dependent on bitcoin income for my family expenses, only 20% maximum i keep for long term investment balance i convert it to fiat currency as and when i require or when i think that the price is high and do small trading and get profit.
It should be like that, sometimes we always forget to spend all the results of our sweat, and never think to invest. Even though only 10-20% that we save. It is very valuable in long-term investment. Besides we can get profit from market treading!