It is a nice and practical article. But before discovering anything, it is important to have faith on it. Though cryptos are fully virtual and intangible, it might take time to be trusted. But I hope one day it will be accepted by mass people.
Why would people trust in alphanumeric characters? We trust people, not things. Things are valuated, not trusted. They are valued by their ability to provide benefit for the owner. How can you benefit from the alphanumeric characters like 0.0001 BTC or 1.5 LTC? They are neither passwords nor some secret code or text. They are not representative of legal claims like fiat currencies. They are not tangible. So how can you benefit from such items?