Imagine a scenario in which you want to repay a friend who bought you lunch by sending money online to his or her account. There as are several ways in which could go wrong,
Including
1: The financial institution could have a technical issue, such as it's systems are down or aren't working properly
2: The transfer limits for your or your friends account could have exceeded
There is a central point of failure: The bank
This is why the future of currency lies with crypto currency. Now imagine a similar transaction between two people using the Bitcoin app. A notification appears asking whether the person is sure he or she is ready to transfer bitcoins. If yes, processing take place and the system authenticate the users indentity and it's done
Crypto currency then removes all the problems of modern banking; there are no limits to the funds you can transfer: your account cannot be hacked and finally there is no central point of failure.
I think, if we are talking about Bitcoin, that it also has a bit of a weakness - the amount it costs to send money can vary depending on how busy the network is at the moment. The fact that there is a fee to send is also a drawback in itself, as I've never had to spend any money to send money from my bank account to a friend. Some people also might be missing the security that banking institutions can offer if they are running a personal bitcoin wallet on their own PC and this can put them at great risk. I like Bitcoin but you have to be fair when trying to be critical, it is an extremely rare occasion when my bank has been unavailable and I don't remember the last time I've been unable to use a credit/debit card due to downtime.