There's enough places that do take bitcoin (eg) that one can cash out small amounts without much trouble.
Fortunately for me, as buying a single bitcoin when they were only worth double figures has provided for almost ten years of computer upgrades for me. Each time I'm left with a fraction of a bitcoin, worth a couple of quid, but in a year or two that's back up to a few hundred quid which equates to a new graphics card or motherboard etc.