Actually I think that's a good advice from op but I think not everyone that can Stick to this advice, reason is because most investors don't have any other source of income apart from bitcoin investment, so this set of people will find it very difficult to hodl their bitcoin till the right. moreover I think this advice will only be helpful to those Investors who have other source of income apart from bitcoin investment, because they  won't find it difficult to hodl their bitcoin, probably if they have any financial problem they can use their salary to sort it out. and leave their Bitcoin untouched, this is why is very good to have other source of income so as to enable us hodl our bitcoin until fiat becomes less popular than bitcoin as you said.