The Lesson I learn from the crypto market is "Hold an alternative crypto for very long time" because it will on rise on their launch. Holding Bitcoin and Ethereum are more profitable than holding ICOs. Other crypto are not good for a long time investment that's why we lost some funds.
It is always good to give importance to the top listed coins. Bitcoin and ethereum contribute big, to the market as well for people's own investments and in businesses. Crypto market is all about holding and should get the earnings on long run. Very few get lucky to buy and sell instantly making some good profit out of the same.