It's only Paper Loss. (if you did your research)

The proper way to invest is to invest in fundamentals. This means to look at the growth of the company and their financial reports.
If you did your research and invested in the companies fundamentals, don't need to worry about short term paper losses. Any dip in price means that the potential for returns is higher. Buy the dip.

However, if you bought into the stock without much research, you may have bought into a falling knife. Remember, a falling knife has no handle. In that case, cut your losses and learn to invest better. Learn how to read financial reports and attend earning calls to see the progress of the company.

When you invest in a company, you own part of it. And it is the companies' responsibility to cater to its shareholders. If you think the company is failing in their vision or mission, it is time to change your investment.

Invest in companies that make you feel proud to be part of the team. High conviction stocks don't have "losses". They are treated as discounts for you to buy more and increase your position.

For me, I think $Tesla (TSLA.US)$ and $Palantir (PLTR.US)$ are poised to change the world as we know it. Disruption of vehicle electrification and data analytics will propel the world to a better place for everyone.

-23% seems alot, but I will continue to DCA and the returns will be glorious... (someday)

Finally, $SPDR S&P 500 ETF (SPY.US)$ is still the best index for beginners who are just starting out to do their research in the investment sector. This is the ultimate no brainer investment product.