Silly question: are old, legacy, pre-BCH fork Bitcoin worth keeping untouched/unspent for some reason? Are they expected to gain in value as "collector's items" compared to the more recent ones?
Came up in a conversation with a friend who hodls 3 such BTC (from 2016). Bought them for $1500, now worth $300,000.
I gave him my usual "keep them if you can, spend them if you must" reply, but I never thought of old coins gaining in value...
it comes down to what you gain by selling BCH now vs the potential "collector's premium".
Best time to sell Bcash would have been Dec 2017 though. Looking at its price right now, the premium might be worth more.
Also, it's way to late to sell / claim the other forks and airdrops. Combining these with BCH they would have been almost the same value as the underlying BTC in their prime times.
TLDR
I would speculate on a premium!