^ This.

First, someone has to step up and package the software. Then, said someone has to keep the package up-to-date by keeping an eye on the upstream repositories, testing... All for apps which hardly anyone uses.

In addition, some Linux package repositories don't accept new packages quite as easily as others.

As for FOSS projects not being receptive of bit coin... bitcoin just isn't all that popular. Yes, it's well known, but not well used. I suspect the crypto shenanigans have tainted bitcoin,