Bitcoin isn't scam. However, banksters and other manipulators wish btc to look so, so that they could buy more at the bottom and then pump. Also, powers that be will never let strangers make money. I mean hardly we, people, will earn on bitcoin. If btc will reach $100k or more, people will get rid of it at first. Poor people can't become millionaires; that unacceptable. And even if you would got some btc when the price is $100k, you won't be able to withdraw it...they just won't let you do so. So I believe the big change is already behind us. In 2017, it was possible to make big money; now it's very unlikely, even if the next boom happens.