Everything has its own advantages and disadvantages. Like Gun has both good and bad uses, we can't quit using Guns since they have a negative impact also. Likewise, the use of BTC on the dark web is a negative aspect of BTC, don't forget its has many good uses also
What gun are you talking about ? It is a crypto coin ? Or the gun that has a bullet ? Whatever gun it is , you can still quit using it if you feel that its not good for you .
same as btc , if you dont like btc then dont but if you think that btc is beneficial for you then why stop ?
And
Not all services in the darkweb are bad but some are useful too . darkweb only got a bad reputation due to its creepy aspects .