Scam requires hidden information, but bitcoin is open sourced.
Bitcoin is open sourced. All the details are in the paper and no one is out there to con you or anything. Even if the founder wants to generate more bitcoins now he can't without going through more than 50% consensus. You can choose not to buy in to it but that's different from a scam.
It's also designed to be used as a currency, not an investment. Right now it's at its infancy hence the value fluctuates a lot but it's not designed to help people make loads of money. If you are getting in hoping to get really rich (and didn't) then it's really your own fault.
Bitcoin also doesn't magically help money launderers and drug dealers either. Guess what's better than bitcoin for that? Cash. Cash transactions are untraceable and private unlike bitcoin, so unless we want to ban cash not sure why bitcoin is blamed for that. The hard part of money laundering is usually not in tracing the money anyway, but rather justifying your source of income. For example if you have no job and suddenly bought an expensive house (with cash or bitcoin) you better have a compelling story to tell IRS...