when such gaints can run into a problem, what makes you think they can't be shut down ?
LONG LIVE BTC, 100% UPTIME

Why are comparing these two things together I am not able to understand that? What you are worrying is social platform with the decentralized cryptocurrencies. If you want to compare with bitcoin you may choose the XRP or Tether that may at least sensible to compare mate.
These companies relay on profit with the share market trending but cryptocurrencies are bumping up with the demand and supply.