Serious question; where does all the money come from to run these operations (eg. the miners)? I mean I haven't seen any legitimate use of bitcoin advertised f

Serious question; where does all the money come from to run these operations (eg. the miners)? I mean I haven't seen any legitimate use of bitcoin advertised for consumers. So who is using bitcoins for transactions? Is this like with torrenting where people keep telling "there are legitimate uses for it like downloading linux iso:s" but in reality 99% of the traffic is illegal. I'm thinking that bitcoin is used mainly for money transfer for illegal stuff (drugs etc.), because I haven't read or heard about any legitimate large scale use of it (exept maybe speculation, so does the money for this come from somekind of ponzi scheme then? Or maybe investors really believe that some day this will be a large legal enterprise?)