my point is no matter how good an invention is bad people will use it for their own benefits.
This makes sense but the problem is, we need to find ways to maximize the good uses and minimize the bad uses of that invention. Yeah it doesn't sound easy but if we don't try, then the bad will outweigh the good. It's just a Trump's tweet. Don't fall for it. He must mention the down sides of bitcoin to colorize his US dollar. It's just as normal as other crypto supporters and haters' debates.
Until the end of time there will always be haters of block chain technology and bad people will use any means necessary to get what they want