Well, do we need it? Because, I can see that people use it only as an investment or as a money laundering tool. Black markets rebornt after the creation of bitcoin. I tried to convince someone to use it, but you know what? I couldn't. Why? Well, honest people don't afraid the central authority, in addition with the dishonest ones. Those who want something that is illegal, cannot do that. So they use bitcoin.
If you ask me I would say what we don’t need in this world are the bad people, but it’s hard to get rid of the people, they will always exist in this life. Imagine that there were only good people in this world, do you think any of them would be on the dark web trading and exchanging trash? No, they wouldn’t. It’s only bad people that you’re going to find on the dark web.
You yourself wouldn’t be there, that’s if you’re not one of those weird people. And you saying that people only use bitcoin for investment and money laundering is wrong. There are lots of people who use it for just transactions. I know a friend of mine that works remotely, the company he works for is in UK and they send him payment using Bitcoin.