If its truly the end of the world as in money will have no meaning in say a long enough time for me to receive the tea and drink it, I might just binge on a tea that is critically acclaimed, as in perhaps buy a chunk of 60's Red label and just brew into oblivion.
Or buy a large amount of Premo matcha and whisk and drink till the world is no more.
As for one tea for the rest of my life,
I feel I like variety too much to even contemplate a decent answer to that.
For the last drink I'll take a da hong pao - assuming I'll have enough time for a good gong fu session. Oh, and I'm still in search of the *ultimate* dhp!
Tea for life... that would have to be a traditional TGY (40-50% oxidized and roasted). My favorite was from Floating Leaves last winter. Unfortunately, Shuiwen's stash was small and I ran out of the carefully rationed 2 oz I bought by April. Haven't had a memorable traditional TGY since