"seasteading"--wow! i could get into that. (at one time i seriously contemplated moving to Alaska &...at least i didn't end up like Into the Wild, but i might have.)
"Icelandic"--i've loved the literature in translation, but too many other things kept me from taking the time to learn the language (despite Tolkien's endorsement!). i still, however, have a book of drottkvaett in the original...
i dunno... i could say, no pursuit of knowledge for its own sake is worthless.
some of my ideas in specific area, to others, would seem crazy: making paintings to be viewed wearing red/blue 3D glasses, for example; some of my elaborate systems of versification, which even other formalist poets would hardly subscribe to; calculating imaginary planets around actual stars, to 13 decimal places (which not even scientists do--they know better)... writing in an artificial language (or a mixture of several) without many (or any) potential readers: is this futile? no. it enriches my experience of ordinary language. other reward doesn't matter.
now, fesler (for those who don't know, that's the plural of fez)--that's an obsession which will one day make me rich & change history .
_________________
"I have always found that Angels have the vanity
to speak of themselves as the only wise; this they
do with a confident insolence sprouting from systematic
reasoning." --William Blake