The answer is actually very simple, you need to do good research before you start trading Bitcoin and learn about both the Bitcoin and the crypto money market. At first it would be very useful to have a very small budget and to have your own experiences for the insufficient future. On the other hand, it is also very important to learn how to manage yourself and your open positions in case of panic because the investor loses money from his / her transactions in panic. In summary, with a little research and knowledge, small amounts of trading should be done first and experience should be gained.
Researching first is the best way to learn trading, not because many people say that this coin will not be succesful in such time or it will be a shit coin evemtually that does not mean you need to follow them, some of the projects before are being judge by many but now it is sucesfull.