I think it is very bad. Such big coins holders and old node holders prevent the people trust dtc and prevent the progress and development of dtc.
May be we need restart dtc blockchain from new origin block.
Only if you're comfortable with the prospect of someone else pulling the same stunt, nuking your stash, in a couple of years' time.
Someone (who failed to enquire more deeply into the background of extro's enthusiasm back when I started playing about with a Datacoin ACME meta-data explorer) mistook me for "the new dev" and offered me 2% of the total emissions to that point for around $15k's worth of BTC, iirc. Maybe they're still interested in recovering some of their speculative investment.
Cheers
Graham