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?
I'm sorry but you can't really trust people. There are evidences of corruption everywhere, and banks are not an exception to that.
Actually banks were created because we can't really trust people, and we start using banks in order to have a supposedly trusted entity that would make sure the transactions we were making were reliable.
Bitcoin does that for you, without the need to have a middle man. You no longer need banks to ensure that the transaction you are receiving is legit. The BTC blockchain will do that for you. You can trust math, because it set by strict rules that can be verified by anyone. The same way you can trust math, you can trust bitcoin. Trust is actually one of the big advantages of using bitcoin.
Another big advantage it that bitcoin, unlike fiat, is decentralized and not tied to any governments. Can you really trust governments? Tell that to Venezuelan citizens, or Zimbabwe citizens, or any other citizens that saw their economies depreciate because of corruption and bad decisions of their leaders. That can't happen with bitcoin, so again you can actually trust BTC more than you can trust fiat.
What gives value to fiat? The people of course. What gives value to bitcoin? Also the people.
This is the only thing they have in common.