i think the whole fight is to save their existing collapsing banking system.
So, they are doing two jobs simultaneaously
1: they try their best to create a very untrustworthy impression of bitcoin among general people, so they can get a bit more time for implementing my point 2.
2:they knews that eventually ppl will go for it as this is the future, so they are trying to build their own blockchain systems hiddenly so that actual capital will stay in their banks
please check these posts as a proof:
https://steemit.com/ibm/@sultanmr/ibm-and-deutsche-telekom-building-blockchain-based-global-network
https://steemit.com/google/@sultanmr/google-public-blockchain-cloud-and-decentralization
https://steemit.com/google/@sultanmr/google-in-blockchain-enterprise-applications