In 2017 I multiplied my initial investment with a factor of 100 (mainly because of my positions in Ripple and Ethereum), but those were exceptional times.
I think that with a meticulous selection of coins one can achieve times 10 in 3-5 years. That is the reason I am using the same method as I did to select Ripple and Ethereum at the time.
With a couple of other crypto-enthusiasts we started a website based on this methodology.
https://www.topcoinrating.com