Talking about cryptocurrencies, of course, it doesn't rule out investing or stocks, in this case, of course we have to be careful in investing because investing also contains risks. The risk here is to lose funds or other assets when the investment does not live up to expectations or even fails. Yes, it is true that we cannot invest and then only expect profits without understanding the risk of loss, but to warn of all possible losses, what steps should we take?
Before Investing one of the most important thing to know is that, investment are made with money which you can afford to lose and that should be money you won't be needing anytime soon, secondly do a good research before buying any coin in the crypto space, don't just buy any cryptocurrency because you see others buying it, always carry out a research to know the reason for buying that particular coin, there are other rules but these are the most important ones.
and when you are talking about crypto investments, it is better to use your money that you really can afford to lose. as you are entering in a very high risk environment, you don't know if you will get out your money with profits or totally lose it.
and in terms of which alts or coins are you going to invest with, you should first check the background of the coin. and if you are a beginner, better start looking at the top 10/20 coins. and once you are diversifying your portfolio and expanding your list, you need to spot potential pnd coins, and avoid them at all cost. you can only get such notion once you are oriented in this market, and that would take time, not an overnight skill to acquire though.