I think this altcoin run has made it very clear that as long as you invest in projects with good fundamentals you can get very good returns even more than Bitcoin and I believe we are only starting.
Some of the altcoins now in this bull run are doing well and rising also like 20-30% in a day, so in such a way where people expect return in a year if getting on best coins in a day is amazing. Though only very selective such coins are rising so overall you need to identify and invest in such coins only where you can find such growth and get the maximum gains.