What is wrong is the banksters adopt bitcoin in their system? I also do not see any problems of other coins to be used in banking system.

Banksters don't adopt anything, they co-opt and control it so they can rape society. For example, they control the money system so they own the government and then they charge the society for all their losses. Numerous schemes and methods of control and destruction.

Note I didn't write "banks". I am not writing about your local Savings & Loan, which is just a pawn of the banksters.

Some educational material:

https://www.youtube.com/watch?v=EYS647HTgks

https://www.youtube.com/watch?v=UrJGlXEs8nI

https://www.youtube.com/watch?v=p5Ac7ap_MAY

https://www.youtube.com/results?search_query=anthony+sutton

Apologies if this direction of discussion is trending too far from the topic title. I am just responding to the post of another.