Because we know such Black Swans are inevitable, hloding 'PepsiCoins' like LTC and BBR is a much more rational action than buying lottery tickets that will most likely expire worthless.
I think most of your post is nonsense (for example removing mining dust is not only trivial but mathematically provable as trivial) but I agree with this part and I think BBR is a reasonable "second cryptonote" to hold as a hedge.
I'm not talking about mining dust. Of course it's trivial for pools to implement minimum payouts. Duh!
If removing (non-mining) transaction dust and the resulting bloat is "trivial" then why is XMR lagging behind BBR in implementing that feature?
My greatest concern for the CryptoNote family as a whole isn't technological but rather social. Many team members/gadflys are so tetchy and cult-like in their 'my CryptoNote baby is the cutest; your nearly-identical one is ugly' BS, I fear a more mature and convivial community could take the ring-sig based privacy coin ball out of our hands.
Of course making open-source sausage is a nasty process, with many high-strung and high-performing personalities involved. When you add in the profit motive of Pump&Dump, all hell breaks loose! But it is in all of our interests to be mutually supportive, and stand united against the pseudo-private ShitCloneHypeScam coins.