I bought some ether and bitcoin, I keep it in a cold wallet. But I understand that active trading can bring more if you do everything correctly. Alas, I don’t know anything about trading. Tell me, is it possible to somehow set up automatic income without constant monitoring?

Yes, the bot https://smartbitboost.de is great for passive income. I also started with a holding, but later connected this bot. It works automatically: you connect the exchange, configure the parameters and that's it - it trades itself, using AI. I go in every couple of days to see the results. Over the past 2 months - a stable +6-9% per month. Not super-crazy growth, but at least without my participation. The money works, and you do your own thing.