The obvious solution is to have both and then make sure that people understand what they're getting into.
Traditional banks should exist and be regulated and insured etc. People with a low risk tolerance should be encouraged to use them.
People with a higher risk tolerance or who are trying to do something innovative or disruptive should have a system that works for them too. People with a low risk tolerance are not required to use it. People with a high risk tolerance will be exposed to a high risk, as requested.
Traditional banks should exist and be regulated and insured etc. People with a low risk tolerance should be encouraged to use them.
People with a higher risk tolerance or who are trying to do something innovative or disruptive should have a system that works for them too. People with a low risk tolerance are not required to use it. People with a high risk tolerance will be exposed to a high risk, as requested.