Is it really a big mistake to sell portion of your bitcoin and then rebuy back when the price has dip?
The reason why am asking this question is because with the right approach I think this can also be done and even help you get good value of bitcoin when the price dip but there are conditions that would prompt you to actually sell some fraction of your investment.
Let's say your investment has reached the amount of years (5+) you set for it and it's now time to sell with the motion of selling being tied to the fact that the upcoming season is probably going to be the bear market, isn't it going to be a good move to actually sell portion of your portfolio (not all) and then still continue with your steady buying and as you are running your normal DCA you are still active on the bear so that when the dip comes you can buy back with that sold amount from bitcoin portfolio so that your value of bitcoin is bigger and still go on and continue with your investment plans.
Basically, there are no absolute rules that are right or wrong, because investment strategies depend on each individual. However, in my opinion, selling some when the market is bearish and buying back when prices are lower is more difficult than imagined, because no one can accurately predict the price of Bitcoin. Many investors try what you are doing, selling at what they consider to be high prices and then waiting for prices to fall to buy back, but often end up losing momentum because the market does not move as expected, this is why this strategy is actually riskier for long term investors.
HODL remains the best strategy for the long term, especially for those who believe in Bitcoin fundamental value.
History has proven that those who patiently hold through bullish and bearish cycles end up making much greater profits than those who frequently enter and exit the market.