A more successful investment will be the purchase of coins at the stage of a private or seed round, when the coin is sold at a big discount. The next stage of the purchase, when you can profitably buy a coin, is the stage of public sale, but this price will be several times higher than the one at which early investors bought.
Right. Try going to Uniswap or Sushiswap or if you like Bittrex, and try go into their socalled private rounds, 90% discounts or whatever. Buy the coin and tell me when it goes listing how much the price dumps, if you can. I've seen too many public price listings way lower than private sale rounds:)