I know some of my mates who are into cryptocurrency that phobia to lose but even with the fear to lose they still go ahead to trade. If beginners allows their fear to motivate them to learn first their won't be drastic lose in trading.
As humans fear is natural when you're faced with uncertainties, despite how brave you are there'll still be that small fear of losing, but it's important not to let that fear to control your judgement. I think that it's ok to have a little fear in crypto trading, because despite your experience and knowledge, the trade can still go against you, so that little fear can make you not to become over confident, and take necessary precautions in the trade. I however think that after a learning stage, confidence should take center stage, with a little fear to remember to be cautious.