It isn't out of line to suggest it, sure.
You literally just said:-
The suggestion of "retiring" the advice is out of line on that basis.??
As for retirement of a meme, I'm not really expecting the community to retire anything or a meme to die. Truth be told, this was a bit of advice specifically intended for an individual in anticipation of a situation.
And in regards to strategy.... everything is strategy. No matter whether your skin is financial, personal or political.
I'm only aware of one clear instance where the advice became a meme (on twitter recently) and I took it as being quite amusing. To view that as a problem shows lack of appreciation for humor IMO.
I seriously doubt that fluffypony is going to answer any differently when people ask him in interviews, etc. whether Monero is a good investment or whether people should buy it, but who knows I could be surprised. I won't be recommending it to grandma any time soon either (unlike, say, Evan who apparently recruited most of his family to 'invest' in Dash, and that has indeed worked out for them, so far).
I just don't think it's consistent for someone to make millions from cryptocurrency, and then make self-righteous posts about the risks of cryptocurrency.
I'll update the advice this way: If you have been studying and investing in crypto since 2011, have significant financial resources outside crypto, understand the technology as an experienced software developer, have a background in business, economics and finance including years of experience with securities and derivatives trading as well as startup investing, then go ahead. Otherwise, be aware you are stepping into a shark tank and people with these advantages are more are competing to out-trade you.