Honest question how do people make money ?

Just to state the fact not trading on binance, but am into crypto, use edge wallet.

And for sake of me I can't twist the head how do people turn profit on cryptos, I'm using 100e as example, and recently bought some BTC, then changed it to OMG token and lost nearly 20% just on gas exchange, anyhow luckily price jump on Eth and tokens and gained back amount, then trying today to sell etc back to BTC or even Eth and again I'm plastered with close to 20e cost to get Eth for fuel in conversion. As read posts here and often see like 2-3 steps where people told best way to convert. So I don't get it does the cost on crypto get lower bigger the amounts to convert it, and how the fuck do ppl manage to turn profit on small amounts shit coins when on many u end up paying more in conversions/swaps, as u can have 100usd whatever make few conversions and you can be down 40% on them costs before u even Started to trade anything