Ethereum should not disappear. I like the new shitcoins for mining lately. After appearing on the stock exchange, their price increases several times.
If you invest 100 dollars, then you can get 200-300 dollars and more, but this is for fun. Bitcoin or Ethereum is better for trading.
It's definitely exciting to see the potential for growth with new shitcoins. But for serious trading, Bitcoin and Ethereum are definitely the way to go - they have stood the test of time and have proven to be reliable investment options.