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.
It may not be a big mistake but of what difference are you who claims to be a bitcoin investment holder from the retail trader who only buys at dip price waiting to sell when price rise. Are you selling due to emergency (then you are meant to have an emergency funds) or you selling cause there is a price?
That the particular approach is appealing to you it can still be not the right approach towards your bitcoin investment when you have to sell a portion of your holdings at every bitcoin price rise to rebuy when it dips. Do you not think you are investing without a proper duration on your investment? You are holding for 6 or 8 years let it be so as planned.
Some people don't really understand that getting much benefit from Bitcoin investment is when you accumulate it over time and hold, that's when they'll get better profits, it's the more reason why it requires patience else the idea of waiting for the dip, buy and then sell when the price increases won't be talked against.
Yes dear, waiting for the dip to buy then take profit when the price goes up is a traders mentality there's no difference between people who do that and traders, Real investors accumulate bitcoin consistently and hodl it for a very long period cause that's what the concept of Bitcoin investment is all about and nor what traders do.