Here are some tips to help you be a better investor.
1.- DO YOUR RESEARCH: Don't buy or sell from others opinion, of course there are a lot of smart people in the crypto world but you have to see the info yourself, the graphs, the news, videos, etc. Make sure you know what you're investing/trading in, is it an app? A protocol? A silly coin? Is it focused around another protocol like ether?
Every good alt coin have a website where you can check literally what it is, and after you do the research ask yourself if you see future for that technology.
2.- ALWAYS INVEST MONEY YOU ARE WILLING TO LOSE: It sounds silly, but its right. If you are having trouble deciding if its better to invest or buy something you NEED like a car or something, always buy the priority, don't take for granted that you will earn money the minute you get in.
3.- ONCE YOU'RE IN, YOU'RE IN: DO NOT PANIC SELL, you are not losing money if you haven't sold low. If suddenly there is a big correction in the price BUT you did your research first and you believe in what you're investing into, do not panic, be patient, it will recover. And remember, you are not losing if you're not selling low.
4.- SET A STOP LOSS AND A PROFIT LIMIT: "Bulls make money, bears make money, but pigs get slaughtered" Don't be greedy, and do not FOMO, MAKE a plan and stick to it, if you think the market will go up forever, well you're wrong and eventually you will lose money. Trust the info, catch the trends and the new tech... always.
5.- BEWARE OF THE ICO'S: As you make your research for current alt coins also do the research for ICO's, a lot of them are scams and they will take your money away. I picture Initial coin offerings like an episode of Shark Tank and you're a shark, analyze data, and make a judgement.
I hope this info is useful and remember to always be patient.