1. We can work on more than one thing at a time and I’d be quite surprised if the original poster didn’t want to do something about those companies, too.

2. For all their many flaws, those industries also provide something of value. If they shut down tomorrow, people would miss having cars, pesticides, fuels, medications, etc. but if every cryptocurrency suddenly halted tomorrow nobody outside of a few speculators would find their daily life any different. That doesn’t mean that those externalities aren’t real and don’t require action but they’re widespread because there is some kind of real value to society and you’d need a transition plan to avoid disrupting a lot of processes.

If a heroin dealer is imprisoned, his customers could have severe withdrawal. Some might even die from it.

I'm gonna bet OP would be happy to ban hammer the hell out of the companies who's entire business model is giving their customers cancer and preying on addicts too

This is classic whataboutism. We can't do anything to improve the world because there are other bad things happening in the world too.