There are many people who may understand how to trade but they spread several assets. So when one coin goes down they still have a chance in another coin. But this also does not necessarily give us passive income because the market talks about coins that are always fluctuating.
You can get passive income from such fluctuations especially if you are trading the coin. So if there is a downward movement, some people have benefited one way or the other and likewise up movement too, people make passive income.
Apart from trading, people are now also making passive income through mining of coins through different medium like telegram
Trading and Telegram are not sources of passive income because if you earn any kind of income on Telegram, you are given tasks that you have to do, due to which you are paid. And, in trading, you need to be constantly watching the market and making trades manually, even if you are doing copy-trading or using a bot for your trades, you still need to keep checking all the time to see if things are going the way they should.
Passive income is where you have invested some of your money somewhere and you are getting profit from there, you don't have to spend time there all the time. Yes, if you are doing mining, you can call it passive income, or maybe investments that are for the long term such as in Bitcoin, but only if you are not spending much time on it after making your investment.