~ many of us that buy bitcoin in January and February are still holding at loss. ~
Correct, the biggest problem regarding investing in cryptocurrency is to predict the peak and when it starts to fall, basically the right time to enter the market. It's not easy to do it right as many people predicting bitcoin will rise to $50,000 and high price in January and February is just a start. But if you see it carefully, bitcoin has started to fall sharply after reached its peak on December 17th, 2017, yet recover to $17K on January 7th, 2018 but then fell afterwards.
However, holding at loss is better than sell at loss, a right thing to do. Keep your bitcoin in cold storage for a year at least, or until bitcoin reach new ATH. Forget it for a while and starts over again with new funds. $5,900 was the lowest level for bitcoin in this year, consider $6K-7K range as the good entry point. Majority of coins at discount right now, feel free to re-invest, as the moment bitcoin rise again, other coins will follow.
Remember the rules:
1. Anything you have spent on cryptocurrency, consider it as a loss until proven otherwise, so do not spend more than you can afford to lose.
2. Be patient, profit doesn't come so quickly, sometimes it takes months or even years. So, keep your coins safely.