Crypto is really unpredictable. While reaping profits of hundreds of percent, the section withstands now and will continue getting dozens of billions of dollars erased flat out in the future. When Bitcoin loses its value against the US dollar Altcoins usually go through the same process. Simple math shows that even holding a part of the portfolio in Altcoins, such as Ethereum and Litecoin, is usually not enough to avoid getting a big chunk of the portfolio’s USD worth wiped out following a Bitcoin dump.
Bitcoin tends to find resistance at whole number points. For example, at $4.8k and $4.85k. It also absolutely loves to react at whole numbers like $10k and either drop or run. If you know you want to take profits soon or buy soon, keep an eye on those whole numbers. If you feel like the run must almost be over, pull your profits before the whole number is reached!
There are lots of studies about emotion in trading. Fear of missing out, greed, etc. are very common causes for people to make mistakes while trading. No matter how experienced you are, you will eventually be led by emotions and this might make you lose money, so you have to prepare yourself to do it as little as possible and to control yourself better or you will lose more than win.
Only invest what you can lose. During the recent crash in January 2018, hobby-investors got burned. Reports of frustration and losses came at the cost of broken monitors, smashed laptops, and heavy monetary losses. While the rules are in more particular order of importance, it’s safe to assume that this is the most important rule, the rule to rule the rules. As soon as your money is converted into cryptocurrency, consider it lost forever. There is absolutely no guarantee you can get it back. Losses don’t simply come from dips in the market; extraordinary factors such as hacks, bugs, and government regulation can mean you’ll never see any of your money again. If you are investing money you can’t afford to lose, you need to take a step back and re-evaluate your current financial situation, because what you’re about to do is an act of desperation. This includes: using credit cards, taking out mortgages, applying for loans, or selling everything and traveling the world (as glamorous as that sounds).