You can buy bitcoin, and then wait for it to rise, you can also see the signature campaign, so that it can get bitcoin.
or you can use the bitcoin that you bought to increase using alt trading just needed to study the market flows
and start placing your entry point mastering this will allow you to get good stable income.
To work with cryptocurrencies in a more stable way, I would say mining. But today it's complicated because of the mining diff and electricity costs. There is the possibility of building a solar-powered mining farm, but initial costs are likely much higher.