We are not going to need any of them until we do. People just don't adopt them because wallets are still difficult to use, , they are a nightmare tax-wise and b

We are not going to need any of them until we do. People just don't adopt them because wallets are still difficult to use, , they are a nightmare tax-wise and because most banks fear/hate them. But in a world beyond those obstacles, many of them will be useful for different reasons. Some will be safer as long term value stores , others will be fast enough for microtransactions. Considering that exchanging between them is trivial and instant, i think there will be many of them circulating in parallel