Hello can I change my username here to "samulak"
That is same as my bitmit.net username
https://www.bitmit.net/en/user/samulakand my web-otc username is same
I registered here under my common forum "nickname" long ago
Your account has been quite long registered since 2012, which is a reason to add to your chances of getting that done, but your rank is something I may not be able to talk about if the requirements needed for that is inclusive by ranks, but things like this are done base on request through PM to Theymos, he's to decide on wether he can grant you or not, so i will encourage you to do same as others do, give your reasons and attach the old and new username you want to bear henceforth, am sure he will reply you.
You are the only one that I read who posted the right advice here, since it is possible to change the username, why are people confusing the OP? I took my time to read this thread since it started with insane advice that the OP should open another account and go through the stress of the new account registration.
To make matters worse, most of those who replied to the OP said the same thing neglecting the fact that the account is not new and has some opportunities/privileges to have some activities and merits that the new account can't provide immediately. Theymos often help people change it, at least the OP will try. But I further advise that he can first continue with the same username and get active and established again on the forum before requesting such.