For me , it is its ambiguity of the what it is exactly. It started more like it was a tradeable tool but has become an investment tool mostly. People i think wait for it to be used totally available as tradeable option.

These are the list of common challenges that bitcoin may encounter:
1. Low security level, scammers are everywhere that's why it is very risky to invest a huge money in bitcoin.
2. Slow transaction and high charging fees
3. Use it for illegal doingds
4. Unpredictable price
The only way to prevent and face those challenges are we should be more careful on what we are doing and accept yge fact that bitcoin is too risky.

In that almost a decade of existence, bitcoin has already faced and eventually survived numbers of challenges, including attacks from the government who claimed that bitcoin is a treat to the economy. Bitcoin has become a target of prejudice and fake news, People who are greedy tried to use bitcoin to persuade other people to get money from them illegally. They are riding the popularity of bitcoin to fool other people. Let us be more aware of the true purpose of bitcoin and how it actually works. In a way, it will protect the entire system including us who are into the bitcoin community.

In every investing have risk but if we think that risk we cannot be successful in the future. The challenge of bitcoin is the value we can't predict when it down or up but all investors are optimistic that bitcoin will win and rise and brings happiness to all his investors.

Every bitcoin user has faced the price wherein it goes up or down so rapidly every single day. It may gives us headache to think too much when is the good time to trade or just hold.

I think the most common challenge if a bitcoin user is to face the price market is going down or high as fast as they can. You cannit predict when or how ut works. You cannot control and also our emotions for seeing the price gies up and up. I couldnt imagine myself when the price last time goes to up faster.

the most acute problem is mentality and loyalty, people have stopped trusting new technologies, especially when when it comes to finance

For me the challenges that Bitcoin is still facing is  widely acceptance. Bitcoin isn't still widely used and some countries are even banning it. If some major online retailers will accept Bitcoin to be one of its payment system, it could be a big help on adoption of Bitcoin.

I think most common challenge is Security, CloudFish developed a security platform that enables companies and individual users to secure their assets stored in the cloud using blockchain technology. it use machine learning algorithms to automate threat detection and control before it becomes a risk to the security of users’ assets.

There is no big challenges of BTC. The only challenge is price drop. It's such problem if people do panic sell and it's will make profit when the price recover. I know it's hard and need some patience but we must try that.