Cycle your passwords often!! AND KEEP THEM COMPLEX.
Ideally generate one using one of the many apps available for this purpose -- in this case, I bring the example of 1Password. It's an all-in-one suite. Best generate a new one for each account. If a market decides to play dirty -- you will be in the clear. Ideally, for the general buyer -- switch up your username if you browse multiple markets. Unless you're trying to build a solid rep, or if you're a vendor. Stay Safe, and always seek better OpSec! ~ D33T
EDIT --//-- This comes from an individual who has used similar or identical combinations through various applications over the years. IF ONE GETS CRACKED, They ALL can burn in flames...
I once worked for a company which had "p@ssword" as master password for their exchange server and "qwer1234" as master password for the SAP SR2 System.
Can't make that shit up.