Knowing your limits is always a good thing, in trading as in life. The important thing is not to set FALSE limits
Knowing ones limits, setting the right limits and then remaining in those limits is not very easy. The most difficult part is staying within boundaries. For this, a person must have a very good self-control with a very calm nature. This takes time. Nobody is calm or patient by nature.
A lot of work needs to be done. Trading is a risky profession and investing in bitcoin can also be risky for a person who gets panic quickly. Without knowledge, nothing can help actually.