These guys could benefit from BitCoin, if it were ubiquitous. Too bad...
I suspect I probably got burnt trying bitcoin, but I would still warn anyone against using Blockchain for anything more than a toy.
The alternative is to run your own client, and download close to 3GB of data at a snails pace. Neither are at all attractive at the moment.
Banks are massive and have pretty much everything insured. If they mess up, it's on them. Not so much with bitcoin, if they mess up their users lose out.
Additionally demonstrated by Mt. Gox, most bitcoin services are run by complete novices. Basic SQL injection on a website dealing with currency is unforgivable.