It is better to be afraid to trade than to keep trading and not making profits at all rather then loses. People makes these mistakes a lot and we need to fix it before it is too late. Trading is not good for everyone and we need to be wise when making choose because we might end up losing all our capital if we are not careful on what to trader and how much we are leveraging in the trade. I have seen people complaining about trading and saying that it's only for people that have the mindset and capability to understand the right time to enter the market and the time to leave.
Yes it is better to not trade if you have no Knowledge and due to lack of knowledge you are afraid to lose. Sometimes an individual's fear helps him to avoid big loss because due to fear he does not enter into the trading world whereas those who want to take the risk without knowledge are facing failure as the major mistakes of these individuals is to consider themselves as risk takers but actually they are foolish as they don't learn first.
Take the risk but first learn and you will find that taking risks with knowledge has more benefits as you will be familiar with all aspects and will try to eliminate the risk.