If you want to hoard that many buy them slowly over a few weeks time and pay no markup over spot.
DannyElfman's assertion that "Since bitcoin is fungible any coins are just as good as any other coins" is misguided.
What happens when BlackRock "the world’s largest asset manager" with more than $4.32 Trillion US dollars under management pushes the issue, and Wall Street Investors demand "verifiably clean" bitcoins?
Who wants to be associated with "criminal activities" and "terrorists" using unqualified coins?
Wake up and smell the coffee man
I won't really care what happens to Bitcoin at that point because I will have moved on to another crypto-currency.