Cash is used for some pretty shitty stuff too, so are credit cards, and checks, and just about every other form of payment.

And funnily enough, Bitcoin is about the dumbest thing to use for illicit things, as it's so easily trackable and records of the money's movement is forever carved into the blockchain (so even if it takes someone 10 years to track the money, or even realize it needs to be tracked, it's still going to be there).

But what about the valid and legal use cases of:

1. paying for goods and services without having to give the company i'm paying access to my account information in a way that they can charge more whenever they want, or lose my information and put my financials at risk

2. Receiving payment for goods and services in a form of money that you don't need to worry about "chargebacks", "reversals", or any kind of way of taking money back after it's been sent

Combine both of those things, and I could see a very real reduction in costs of doing business in just about every area.