When people saw the value of Bitcoin, they also created various altcoins. It will run away after harvesting and have no real value. Although these coins are not reliable, there will be some people who are willing to bet that altcoins can explode. Some people who make a profit from investing in Bitcoin will also choose to invest in altcoins.
In such a messy market, how should we invest in cryptocurrency? What should do with these altcoins？
You should not judge and generalized all these alts. First is that many alternative coins are used and have utility that determine their prices. Some of this alt coins are even richer in feature compare to Bitcoin. I know many projects are coming out scam after being successful and that's where our investigative instinct should appear.