All currencies as bitcoin and some altcoins may be used to ilegal activities but in the end fiat will always lead those market as it is the main resorce of that kind of business.
Indeed every currency is used by criminals, so why should we worry about the fact the bitcoin is ued by them also.
Like every currency it has criminals that are using it but that would not become any problem in my eyes.
Exactly. I wouldn't ever hate Bitcoin more or less just because some no good crooks use it.