Sure there is nothing wrong with accounting for various individual financial and psychological factors (you can see 9 individual factors, here), and it is probably a good thing to do that, yet diversification is not necessary for brand new investors into bitcoin.

Yeah there might be some investors who already have gold and/or silver or already know how to easily buy and/or sell it, yet still I would suggest caution when fucking around with gold and/or silver including perhaps limiting the amount that you invest into gold and/or silver to less than 10% the size of your bitcoin holdings.

Even though you are not wrong about the idea of risk management, and sure I might be repeating myself a wee bit.. yet based on a lot of the ideas that I already discussed, that still does not mean (or justify) that there is any need to diversify beyond dollars (or other fiat) and bitcoin until after a certain amount of time of building up the BTC stash, which surely might be different for different folks in terms of how many years of their salary that they might have had accumulated into bitcoin and/or cash and start to feel some needs to go beyond just holding cash and bitcoin..

In the scheme of investing kinds of matters, it is normal to build up to 3-6 months worth of cash for emergency fund, float and/or reserves, then sometimes it might even be justified that the dollar/fiat values might end up exceeding 6 months depending upon why the dollars/cash is being held.. and surely sometimes there may well start to become greater desires to put some of that value held in dollars to work.. additionally it could well be the case if someone has 50% to 75% or even more in bitcoin and the remainder in dollars, then there also might be some desires to either reduce the amount that is in bitcoin or to stop it from growing to higher amounts... yet there are also theories about letting your winners ride.. but at the same time, there is a bit of a presumption that someone who lets his winners ride is invested into more than just dollars and bitcoin.

Diversification matters are not really easy topics and likely quite a bit beyond the topic of this thread since here we are moreso talking about various ways to accumulate BTC rather than getting into some of the side topics, including diversification and including that I personally consider that any newbie might spend more than 5 years building up his/her BTC holdings before diversification (beyond cash and bitcoin) is really going to start to become any kind of a new motivator - which also might start to get into ideas about graduating out of more strict BTC accumulation strategies and perhaps getting into some kind of a hybrid maintenance strategy that might well justify thinking more about diversification.