The problem is the proportion of your investment in the asset. If you put little capital into a large asset, your investment is practically diluted. Smaller market cap means more ROI variation.

let's talk about buying Bitcoin on spot for the newcomers, the commission is outrageous, buying at 5usdt at 85k and you only get 4.5 usdt and to recover that investment it has to exceed 100k and to make a small profit over 150k because to withdraw or exchange you have another commission, don't be fooled, bitcoin for spot is useless unless you can invest more than 200 usdt in bitcoin and leave it in assets, otherwise it's of no use, I prefer bnb, sol, or ethereum since I trade on spot but I stopped doing it already