It all depends on the price and time when you made the investment. For example, let's take the case of Ethereum. The initial ICO price for Ethereum was BTC0.0005 (in 2015). By the beginning of 2017, the prices had climbed to BTC0.001 per coin. But then the ICO boom happened, and the prices shot up by as much as 150x. The peak price was BTC0.15 per coin, if I am not wrong.
By 2018, the ICOs started to lose their sheen. The ETH prices began to decline and now they are trading at BTC0.022 per coin. So in case you had made your investment in 2017 January, then you'll be sitting on top of 22x gains. On the other hand, if you had made your moves by end of 2018, then you will be in red by 80%.