In the event of the US gov attempting an nation wide asset seizure because of Bitcoin bring an "electronic peer to peer cash system", it would only affect a small portion of less than 5 percent of the global population. The other 95 percent doesn't give a fuck what the US Gov wants or does.
Seized coins = lost coins making everyone's coinsore valuable. Or the gov dumps them back to the market like the DOJ just did
In either way, Bitcoin is not just a store of value because it's more convenient for Michael and his friends.