Those negatives that you shared has a solution. I will comment base on what I know (not expert here).
1. Bitcoin is not easily understood by people with no knowledge of it, at such scam and fraud is high on them.
That's why we have many information in the internet right now right? No knowledge? It isn't applicable only to Bitcoin, but to everything. When you invest, you need knowledge right? Where can you get it? You can get it online, when you have a mentor, or if somebody will guide you. In everything that's related to investing, you really need knowledge in order for it to understand. I think there's nothing that you can understand without any knowledge into it. Just pure common sense.
Scam? Fraud? Did you compare how many scams, and fraud investment have used both Bitcoin, and fiat already? Give us some numbers that shows that it really is high because what I know is that fiat currency is the most common currency that's being used by scammers to scam people.
2. No refund to anyone who incurs loss through keys, seed phase or fraud.
So you're saying that banks are refunding you if you lost your money? It's the same as with Bitcoin. You lose your fiat currency, you lost it forever. For Bitcoin, you lose your private keys, you lose it forever.
3. Privacy- bad people trying to give bitcoin bad name by faking bitcoin apps and site.
Privacy? Isn't it a bad thing? On what way?
Because what I know is that, it's never comfortable to share your private information to some random strangers out there. TBH, privacy has more benefits than disadvantages.
4. Cyber hacking - cyber wizards an fraudsters makes people to loss bitcoin wallets and money.
On the other hand, we have corrupt government officials slowly diminishing the value of your fiat currency thru massive printing for their own sake. Isn't it fraud as well?
5. Price vitalities - bitcoin price is unpredictable and nobody as monopoly of the market.
Vitalities? You mean volatile right?
Why? Do you think the stock market is predictable? Is there any market out there that's predictable with regards to it's price a few years from now? I mean with 100% accuracy.