I really like this post and all your points.
First of all, isn't our current money already more or less digital. Common sense tells me, that there is way more money on banking accounts than ever printed.
To address the problem with lost money and trust, there will be a need of some type of payment processor. Some instance which is going to validate trades, making sure crypto isn't sent to the wrong address, making crypto more convenient, forgiving and trustworthy.
Here i see a role for banks, to bring a service which provides these attributes mentioned above.
Just some thoughts from me, like a lot of other here said already, this is just the start and there will be a lot of development