What is the need of taking profits overtime? what will you be using the profits to do? those are the questions and projecting 20-30 years will depend on the age of the hodler and if they have also reach their target of accumulation. The only time i can consider to take profits from my investment is after i must have accumulated to my satisfaction and have made a lot of profits which i know that if a take the profits i will invest it on something productive but taking profits and still keep it in Fiats or some stablecoins will make no sense at all so before intending to take profits you should be able to have a concrete plan of what to do with the profits you have gotten from your investments.
Profit is taken either when it's needed or when the target is reached.Other than that - surely, one should hodl more and stay happy doing so.
Talking about the bold words in your statement, honestly it's mostly traders that talks like this, you don't take profit from your holdings because you are in need, that's why source of income and an emergency funds are in place to sorts out your financial needs, your Bitcoin holdings is an asset you hold for a very long period of time in other to change your financial status for ever, not what you just hold and decide to withdraw because it's been needed to sort some financial needs, it's only traders and those that Normally sell their Bitcoin for minimal gains that thinks and speaks that way.