People will realize that cryptocurrency is not a "bubble"; instead, it is a channel for massive unmet demand for private, sound money.

Keynesian fear mongering regarding "evil deflation" will be proven wrong as the truism that people must spend money to live, even deflationary money, becomes obvious.

Traditional banks will begin to crumble, much like J.C. Penny and Sears under the threat of Amazon. To survive, they will rely on customers who are late-adopters and laggards, among the very last to abandon the fiat system.

Crypto-banks will begin to dominate. They will be global rather than national. Most people will trust their private keys to these banks, realizing that there is no perfectly secure way to store them. Convenience and "good enough" security will be the dominant paradigm.

A small minority of die-hard users will continue to insist on storing their own private keys and signing their own transactions, much like a few people today insist on compiling their own Linux kernel or building their own PC.

Crypto-banks will be thought of as just that-- banks, not "exchanges." The fact that they provide currency exchange services will thought of as an obvious and necessary feature of any banking system.

There will be no government-backed "FDIC" for crypto-banks. However, banks will compete on security, among other features, giving rise to private insurance that protects deposits.

Banks will provide traditional savings-and-loan services, denominated in cryptocurrency.

Banks may automatically store your holdings as a basket of currencies and robo-trade on your behalf based on pre-set criteria. A deposit of 1 WhateverCoin may automatically turn into a deposit of the appropriate quantities of coins A, B, and C.

People will realize that fiat currency is simply cryptocurrency running on a single node where one miner can arbitrarily issue new coins. The largest transfer of wealth in history will occur in slow motion, as the value of fiat currencies drop to zero.