for some people to earn passive income from altcoins is very difficult. unless you have a large number of stablecoins and then you bet like on binance. But for those with small capital it will be difficult. I myself can get a decent income but it can't be said to be passive income. High risk is one that must be faced in alternative coins. So I myself do not choose to invest long term in altcoins. and I actually only trade on a medium scale. i.e. enter in a coin that is hype or will be hype and exit or sell when it is profitable, usually at the peak of the hype or when the hype is still going on. Don't wait for the hype to end.