There are many things most likely to consider whenever you're investing money in crypto..
These are:
1. Volatility of the Market.
2. They don't have the knowledge about crypto.
3. Negative news that they see or hear in social media/TV Media.
4. They were scammed and afraid to invest again.
5. Threats of hackers in the internet.
But users can also protect their computer from hackers by using:
1. Virtual Private Network for Internet Protocol
2. MetaMask Wallet
3. Not saving any private keys in your PC.
Everyone is afraid of losing their money but no one is afraid of winning lol. The reason most of them are afraid is because they dont want to lose their money and they also have no intention to hold it for long. Majority of the people that comes here are not here to stay, they just heard the news of how many people were able to make money through Bitcoin, either their friends told them or they came across it in the news and they want to make their own money and get out. But they come in and start seeing something difficult and different from the way it was explained to them.