Nah. When I first heard about bitcoin back in 2012 or so, I assumed it was some sort of scam--or at best a fad or gimmick like Flooz was in 1999, some sort of internet currency that nobody wanted or needed and that would die out within months. Turns out that I never changed my position on the latter (I think it's a solution in need of a real problem, at least for civilized countries), but I was dead wrong on the first part. It's definitely not a scam, Ponzi, pyramid, or otherwise and it took off to a degree beyond anything I'd anticipated.
Right now I'd be careful investing in it, because it's near its all-time high, and that's exactly the point at which people start inflating the bubble and then it pops. Can't say for sure if or when that's gonna happen, but I get the feeling that it will. We'll see. But it's not a scam.
I agree and good point mate. I think because the gain is so quick that's why many people seem to think that bitcoin is some sort of pyramiding scam; however, even if you track how it gained value, you would see that it mostly gained it through investment and trades, and through massive support and usage from cryptocurrency believers. Unlike pyramiding, where you get someone's money to be gained by topline members, which is not the case for bitcoin's rise. Also, since it has been there for a decade, more or less, no pyramiding scheme would last that long.