A scam is probably not a suitable term for Bitcoin - there is no dishonest scheme with malicious intent from those who are behind the technology.
I don't think Bitcoin will collapse, but rather will lose its popularity. Now, Bitcoin is more of an asset than a currency, like a collectible. It is worth what other people are willing to pay for it. Like Beanie babies or fine art.
It has fundamental issues that make it difficult to be adapted as currency (those "issues" are seen as "advantages" by many). If Bitcoin proves difficult to be adopted by a large portion of population, it will start dwindling down until forgotten by most.
It will still be used for transactions that people want to keep hidden from the authorities. I'd speculate this will happen in 10-15 years.
Bitcoin is definitely NOT a scam. There's no single entity behind it after all. With decentralization, everyone benefits in the long run. Those who say Bitcoin is a scam are nothing more than haters or people who don't understand what Bitcoin is all about. It's been 12 years since Bitcoin's inception, and it's still going strong as sound money anyone can use worldwide. Blockchain technology at its core is truly a work of art. How people make use of that technology is another story. Bitcoin may not be a scam, but it's possible to scam other people with it. What matters is decentralization and censorship-resistance. As long as Bitcoin stays true to its roots, it'll last a lifetime. Just my thoughts
