Satoshi created a currency unit without a central party being necessary to prevent unit duplication.

And you want to tell me it's impossible for centralized exchanges to build a clever system that enables users to have some form of control over their trading funds? Well, perhaps it is.

Yet our bitcoin exchanges  miss other things too that could alleviate theft and fraud. Lack of audits, insurance, ...

Luckily, it's only a matter of time until we'll be able to safely trade Bitcoin on traditional brokers via ETFs. Until then, we'll have to cope with this amateur hour.