The priority right now is to get capitalisation to a level where separation of money and state can happen. Till then buy and hodl even if it concentrates coins is debatably a good act. After $1m per coin it’ll be a reserve currency and you can sell it; it’ll be on the denominator of pricing goods and services, and won’t impact capitalisation.

In this scenario I’m assuming Block will be doing impactful work with its gains rather than seeking world domination.