As long as you know the risks of trading and you invest within the limits where you can afford to lose that's where trading is fun. Not only profit in terms of material, if we lose assets but the knowledge we learn in project analysis will definitely increase. But for BTC and ETH I think these two coins are no doubt, they are very good at controlling the market in various conditions.
yes, I agree with you that in crypto it is not only material profit that you are looking for but knowledge can also be obtained when investing in crypto, such as when doing an analysis of the project you are investing in even though your prediction is not right, but a little or not you have gained knowledge from these investments, of course for the future you will certainly be able to get a profit from the investments you make later.