Everythin is used for q criminal activity, i eon't believe that that fact could hurt bitcoin thqt much on the long run. Thqt fact could slow down btcs progress at the beginning but i believe it wont have any impact later on.
Yes, just because bitcoins are used for criminal activities should not be an argument against bitcoins. Any fiat currency is used for illegal activities and people still don't want to get rid of them.
True illegal activity is used or canuse or be injected in any form of currency.
Currency as we know is a tool use in trading goods and stuff so basically anything that can be use to replace fiat money in order to hide from government regulation is an advantage for these people. So they would likely to migrate in using bitcoin as their tool for payment.
your statement which i just bold above is definitely right,currency don't have brain to choose an option whether to be used for criminal things or good things,and can't spend themselves,it's just some people who have lack of thinking ability and end up generalizing a currency