Yes, I expect within 15-20 years notes and coins will be dematerialized in many parts of the world. Already today I almost never use cash.In India, we have been using the mobile payments system linked to our bank accounts for a while now. I think the idea that assumes this technology could accelerate bank collapse is far fetched. If there is a rumor that a bank is likely to collapse, there were ATMs to take our money out. However, ATM withdrawals had upper limits. Even the mobile payments system has similar max limits for moving the money per day per account etc. Today many of us hardly use ATMs. And the cost of moving physical cash around ATMs securely is very high for the banks too.

