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.
Since Op chooses BTC and ETH investments there is nothing to worry about, maybe he is very quick to buy at non-recommended times and his purchase is not DCA, so even if choosing investments in both asset management must be aware that it is not recommended to buy all-in at once in coins of all assets for portfolio.