You see, not everyone would accept something new. A lot of people are bent on remaining with the old and never changing or accepting change. So, not everyone would accept Bitcoin. A lot of people, even though they know the fiat currency has the probability of failing, would still put their trust in it because the fiat currency has failed and picked itself from the ground many times. So, I can't really blame anyone
And another reason would be the risk that is attached to Bitcoin. People would call what is a scam, a scam. There's a high probability that their experience with Bitcoin was a terrible loss or maybe they've heard of stories from and about someone who invested their savings in Bitcoin and lost it all. You don't actually expect such a person to believe in Bitcoin anymore. Of course, they already know it as scam, and as such it shall be addressed.
The best thing is to leave people with their different opinions and perspectives. Do you, and follow what you want to.
Well people lose money in any kind of investment. And if they lose money, they tag it as a scam. In many cases, it only becomes a scam because people don't know how to handle or run their investments. Bitcoin, Etherium, Ripple, and other older coins are already established cryptocurrencies and they have people who made money and are making money out of them. So even though there are those seeing BTC as a scam, it's obvious that it isn't anymore at this point. It's just a little too expensive now for those who are just planning to buy BTC if you're not aiming for a long hold.