In my opinion the best way to make money in the cryptocurrency field is trading, trading provides realistic profits because the income earned is in accordance with the altcoins we buy. If the altcoin we buy experiences a large increase, then the profit will also be large, provided we buy at a low price and sell at a high price. It can be seen historically that ETH in 2019 is very cheap at around $150, but in early 2021 it is quite expensive at around $4,300 so there is a significant increase and we can imagine if in 2019 we buy 1 ETH at a price of $150 then if we selling it now will make a profit of $4000.