There used to be a saying like "do what the priest tells, not what he does". I think that with the maxis it's the opposite.
I mean, a maxi will (correctly) tell that the ultimate shitcoin is the fiat. So he has no reason to sell. Ever.

Yet, he has to live, eat, have a vacation and so on.
Hence unless he has a fat income, he has to sell now and then. (And if he has a fat income and fiat is shitcoin, then why he doesn't convert it all into bitcoin from second one?)

So, while maxis are a good part of the ecosystem, you better do as you think it's fit for yourself, than doing what this or that is preaching (and probably not doing it 100%).