Nah, this would mean LESS capital gains tax for whoever bought it, at least in the US it would. If he had say 1-2 mil worth he could sell it to someone who needed to cash out at 15% instead of 25% they might pay 5% on top of it to save 5%.
What I was thinking was if the coins are older that means he bought it when the price was lower which means the capital gains are higher.