Webdollar currency is not trustworthy. Developers are incompetent and liars, how can somebody trust them with anything?
The big problem with webdollar is security, hackers laugh at webdollar, someone with a 5$ botnet can ddos the shit out of the network (huge scalability problems).
Webdollar does not have cold storage: ability to sign transactions offline such that the private key never touches an internet connected machine. Private key export is not enough.

Nimiq is secure against hackers of all types and never had scalability problems, the best web browser cryptocurrency.
They have a real bug bounty where vulnerabilities are disclosed by white hat hackers. Webdollar is shit, it's just a matter of time until they will lose everything (trust me on this, I have good sources).