I first entered crypto world by the altcoin door by investing during ICOs but it's a risky way because a lot of projects are still scams.

If you research first and diversify your wallet it can be a good investment as it gives the opportunity to have cheap coins/tokens easily and for the moment with all the cash coming in crypto the return on investment can be huge. 

But as always, be careful and never invest more than you can afford to loose.