It is just normal for bitcoin to move rapidly that's why no need to panic but this may be just applicable to those who already experience how the price moves but for those new investors, it would be so stressful to watch the price moves a thousand dollars in just a short span of time. It would only be a paper loss if they do not sell but if they panic sell then that would be a realized loss. If one would invest in bitcoin, they should know first the risk involved because it is highly speculative.