OP investment is different from gambling it is only in gambling you gamble what you can afford to lose so that you will not be disappointed in investment you don't have to worry because your funds never lost. And all what you have to do is to plan your investment very well. Either long term or short term. If it is short term den go make some survey for the movement of di price so dat you no go go invest when di price dey come down but it is good to invest when di price e dey di dip and once im go up X3 or more of your investment den you sell it. But if na long term investment then you don't have to worry for anything just be buying until di time you like to sell. So I don't see any lose in investment but in trading and gambling should be what you mean.
Of course is only in gamble that you stake with what you can afford to lose, because there's no guarantee about what will be the outcome. Actually I think op is referring to meme Investment you know memecoin is always like that is very hard to predict their future most of the memecoin after been hyped they get dumped so that is why if you're investing in memecoin is always advisable to invest with what you can afford so that even if you experience lose in the market is not going to affect you in anyway. Moreover you don't have to say that there's no lose in Investment you know there's always a risk in everything that requires money there are two things involved in crypto investment that's is either you lose or you gain those Investors who are very deep in crypto investment knows how crypto investment works though everyone will always want to make profit whenever time they make Investment but it never works like that you don't expect profit to come everytime you make Investment.