Monero folk will tell you we need more anonymity. sure, i'd like more but i think Bitcoin gives enough. unless one can attach a human identity to each address in a linear sequence you can never be sure you can tie the ends to each other of say a 5 address sequence. you might infer it but you'd have to do some investigative work which police can do if suspicious. that's enough anonymity for the ordinary user not doing anything wrong.
in short, Bitcoin should be able to provide everything for everyone. that's my opinion at least.
that doesn't mean it won't happen though but is the reason for the extreme resistance to it's adoption from the economic majority who are currently invested in Bitcoin.
There you go. A rational individual (investor) with this set of beliefs would hedge. If you don't, there is something other than a rational decision making process going on. No refutation of this is possible. For the logic of hedging to be incorrect you would have to be 100% sure that Bitcoin is the Eternal One True and Only Coin, which you apparently are not (see above). If you had that unquestioning faith, fair enough, but since you don't, then not hedging is just a mistake.
that's your rationality.
i think it is such a remote possibility that i'd rather take the risk of not hedging and instead riding Bitcoin to new heights. Monero is
at this point. and it's on par with other altcoins that i find equally as improbable therefore i have concluded that i will be willing to pay a premium in the far future if it seems to be gaining traction; which i don't.