Merely because an investment is long term does not mean that it is going to be guaranteed to be successful.  Surely having a long term conviction about an investment may well show that you have confidence in the long term potential (and likelihood of success) of the investment.. You might not be correct in your assessment, and surely, for example, if you long term invest into a shitcoin, you have pretty decent odds of not doing well with such an investment, and for sure, many of us bitcoiners consider bitcoin to have an ongoingly good and strong long term investment thesis, yet if we are not sure why we believe in such thesis, or if there might be something about the strength of the long term investment thesis that weakens, the we may well need to reassess if we might need to reallocate our holdings or change our position size such as reducing it or completely selling it.

Personally I consider bitcoin to be a long term holding asset, yet if I found out that I only had 1 year to live, then maybe I would decide to completely cash out of whatever BTC holdings that I have, so that would have to do with my situation rather than my thoughts about the long term strength of bitcoin's investment thesis.