Promoting investment in Bitcoin can (in theory) be legitimate if you sincerely believe that Bitcoin has real value. By contrast, pump and dump schemes involve l

Promoting investment in Bitcoin can (in theory) be legitimate if you sincerely believe that Bitcoin has real value. By contrast, pump and dump schemes involve lying about a security you know to be worthless (or at least worth far less than what you're saying). The fact that you dump it immediately makes it easy to prove this.