Now we can have full confidence in Bitcoin but Bitcoin is very expensive due to which it is not possible to buy a good amount of Bitcoin even if we want to.
Those investors who hold from bitcoin <$100 had confidence in it since then and that made them rich today, not all had the confidence to continue the journey , it dipped massively at some points and some investors sold all of their holding while some sold large percentage for sure but it'stheir investment, they might not have regrets since they made profits but they couldhave made more though, if they had not lose trust/confidence in it..
Hence, it can still be cheap at the moment compare to when you start seeing it @500k .. true it's still expensive to accumulate good amount as at the current price but accumulating it continously can give you a better amount over time(what matters is that you're willing to hold for long) and how can you do that?? It's simple just practice what the thread is all about along with the DCA strategy, accumulate for cycles and check your portfolio (you will see how far you've come)

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Though it's very wrong shall but to say when the need is not available the available become the need could be their situation at that point because some is not as a result of clear eye but been instigated by unknown factor beyond some emergency fund mostly life threatening issued.