govt, nsa, etc. .. big banks. Almost anyone 'big' has an incentive to take down bitcoin
they will end up losing more money than anything else, it's better for them to welcome bitcoin and embrace its technology, if they can regualte it and taxe the shit out of it like some GOV are already doing, it would be a win win for everyone, maybe not for die hard bitcoin fan who want freedom...
Die hard bitcoin fans who define freedom as financial privacy and perfect fungible will find other solutions such as Monero.
Of course Monero allows compliance with all government rules as well by optionally sharing your view key.
Best of both worlds.
Bitcoin is resilient and will survive long term. There will be other leaders that emerge to serve the niches bitcoin cannot.
Smart early BTC adopters will hedge accordingly