Some people will NEVER sell their bitcoin to the gov...like me! 
Me too!!! NEVER NEVER NEVER
I'll sell, 1BTC/state. Maybe they'll give me NJ at least.
I'd say save 2100 BTC or 0.01% of world BTC reserves, than trade the rest. Only 10 000 tickets to this particular lottery/investment will ever be for sale. Optionally, save 2100 * N, where N is your personal greediness coefficient :-)
To me it makes more sense to buy according to personal wealth. It would be hard to buy 2100 if you couldn't afford it, and probably a silly place to stop if you are a millionaire.