Top coins do not give the income that was before. The modern cryptocurrency market dictates its own conditions, and Alt-Coins with high volatility come out on top. For example, ADX and others.
You can definitely make more money on altcoins, but they also have higher risks and you can lose your money. because if bitcoin fell by 10 percent, then altcoins from the top 50 fall by 40 percent, and the altcoins from 100 till 1000 will fall very very deep
But risks can also be justified, if altcoins from 100 to 1000 can fall deep, they can also increase many times, therefore everyone should be able to assess their risks.