Yeah, that absolutely poses a threat to government-controlled fiat currency - but it poses another separate threat that shouldn't be understated: If a company like FB or Telegram becomes in control of a pseudo-currency, now individuals' right to use their currency are under the control of a for-profit corporation. We've seen recently just how bad that can get for people's rights - perhaps even worse than what governments already do. When the US government steals your shit you can at least sue them because there are laws on the books prohibiting it, but is the law going to protect you when Telegram invalidates your tokens? Maybe?
