Nice to read the answers, to know others experiences.

I have started a week ago with alts, invested about 115 USD, have about 140 USD now, planning to invest some more, waiting for the BTC price to go down. Trading with 5 different alts. Rode Pascal wave halway up today, it was nice to see how quickly things can get hot.

Just like others said, it's mostly the amount of money that is not too much to loose.