Well unless Bitcoin or some other altcoin becomes what they're really intended to be (i.e., a usable currency) at some point you're gonna have to..
That said I generally agree, apart from a minor amount of trading I usually just buy and hold. Only reason I actually sold in this case was cos I hit my target of ~200% growth at which point it was always my intention to sell out my original investment - one third. Rather than selling exactly 33% of every crypto I owned I decided to get completely rid of some that I considered deadwood.

For what it's worth I still think XVG is deadwood, though I believed it had some potential when I initially bought it, trying to use it and reading more about it and the devs I eventually decided it was just a scam.