It's normal to experience a loss sometimes when investing in cryptocurrencies. Not everyday Christmas mate but as long as you are confident that you invest in a good crypto, just continue to HODL it and you will be just fine.
And how do you know if an investor is investing in a good cryptocurrency? What are the metrics of a good cryptocurrency that make it easy to hold. This is a rather vague characteristic for an altcoin, because the altcoin industry is built in such a way that some new token from the depths of coinmarketcap may be a better and more reliable investment than a coin that is at the top of the crypto ranking.