i'd say if the circumstance is fitting and there's emergence of meme coins that might take shib throne i'd say it's always good to sell shib and convert it over to the other meme coin with higher potential.
you could make massive profit from pepe and milady had you sold shib at the right time and I think that is a valid reason.
If the opportunity is very clear and visible maybe it is very good to do in the future. You have a lot to analyze with all of this. If its good and see new meme coins coming up for a great price would be a great time for all of this.