What about CASH and consumer protection?

How can I be sure that my CASH would be protected from scammers or how can I know the stability of CASH?

You should know to whom you can send money directly or to whom you need to use an escrow to complete your deal. If someone scammed you means you didn't take steps to protect yourself. You already know online is full of a scammer then why would you want to send money without a trusted escrow?

If bitcoin is stable then many people will invest in it because people want to make money from this volatile market.

Bitcoin is all about decentralization and hence there is a distribution of the responsibilities too. There is no central authority to take care of your funds and even if you are keeping your funds on any exchange, there is no guarantee that you will get your funds back in case of any hacking attempt. However, Bitcoin as a technology is very strong and no one can steal your funds if you are taking enough security precautions. Keep your funds with you (offline) and make sure that you are following security guidelines.

There is no central authority to take care of your funds and even if you are keeping your funds on any exchange, there is no guarantee that you will get your funds back in case of any hacking attempt. However, Bitcoin as a technology is very strong and no one can steal your funds if you are taking enough security precautions.

Its life and there is no guarantee on everything you do, and since bitcoin didn't have any regulation yet thats why there is no guarantee to protect your bitcoin from hackers. However if we're talking about dealing with scammer then its up to yourselves to not trusting any HYIP and its up to your decisions not anyone can gave you perfect decisions. If bitcoin was so stable then there will be no hype about it until now, because it has such a high volatility that makes people want to try their luck to become an overnight billionaire and thats why people keep coming to this forum. 

your money are never fully protected from scammers, even when you're using fiat. You need to be the one who protects it from scammers, just need to take necessary precautions.

Using consumer protection and scammers in the same sentence is contradicting yourself because even in the fiat world, scammers are there to collect your money and there is nothing to do about it. But talking about legitimate business enterprises, the issue of consumer protection as at today is zero and part of the reasons that is making people lose confidence in the market. You see exchange sites intentionally suspend trading on a particular coin, suspend payment, refuse to answer ticket while their gambling sites counter parts would just come up with policies over night whether fair or not? its not their concern. The only place you can complain to is the social media or the forum to warn others from falling victims.

This is not happening outside, not perfect though but there is consumer protection councils, trade regulators, government agencies and the powerful of all the social media that can address all injustice and they will be brought to correct such anomaly. Over here, you are just on your to be responsible for your own security.

Reassure me that you ask this question is your step to invest in bitcoin. First way to invest in bitcoin, you have to understand what a decentralized system is in cryptocurrency. Your question will be answered if you have understood it. Cryptocurrency or bitcoin offers a risky investment, all your security systems are set up. Your money will be safe if you keep all your wallet password safely. And about stable bitcoin prices, it will not be possible for the next few years. It will always come good news and bad news that will affect every investor.

   If you want to understand Bitcoin, you should know the blockchain very well. The most important feature of the blockchain technology is a decentralized structure. Everyone can use it, but it does not belong to anyone. Bitcoin is a product of blockchain technology. So in short we can say. Anyone can use Bitcoin, but no one else. If you are deprived of rights, you have no one to ask for. So if you want to invest in Bitcoin you should do a lot of research.
   Because of the feature Bitcoin has, fraud can be done and it is not known who made it. This is a problem for now.
   Portable wallets are available now. Be very careful when doing your transactions. It is not necessary to enter bitcoin transfer with untrusted centers.
   Never forget that. Bitcoin is trading in stock markets. He will always be a chief.

If your question is how will your bitcoin be protected to scammers will be up to you. If you dont give your btc to the scammers then it will not go to them. It is like your paper money, it will not go to the hands of the scammers if you will not give it to them. With regards to the stability of bitcoin, bitcoin is very stable but its value is a subject to volatility that means that it has the tendency to inflate or deflate in value.