We do need stable coin, if we intend to use crypto for day to day transactions.
Specifically for transactions that take time, for example if you want to pay for building a web site. It can't be the case that the value of the project is half or double at the end of the project.
Hopefully the community can figure this out. I really believe that crypto can become a day to day trading tool, but is has to be stable enough to be really useful!