sell the Bitcoin that we have. Even if we are greedy and HODL Bitcoin too long it will make us lose many opportunities to get profit. Moreover,
the price of Bitcoin is very volatile, so don't hold Bitcoin for too long. Sell when we have made a profit and buy it again when there is a correction.
By doing this, the profit we make from Bitcoin is far more maximal, because for me HODL Bitcoin is for life.
I have a slightly different take on this. You should sell your Bitcoins, when it is clear that a peak valuation has been achieved and the future prospects are not very bright. The target is not something that should be constant. Target could be changed to reflect the changing market dynamics. For example, if you had purchased the coins in 2012 or 2013, and at that time you set a target of $50,000. Once that target is achieved, you need to think about the next step. If you feel that the future prospects are good, then you can sell a part of your coins and keep the remainder for the long-term after setting a new target.