The best way is to invest in a profitable ICO and flip your profit into anothe profitable ICO just imagine that the first ICO you make 3X of your money and the second you make 3X of your money your 1BTC has been turned to 9BTC
But what is the guarantee that every new altc coin ICO will triple our investments. In my opinion investment into altcoin is always highly risk involved. But I also do see many people are sharing their earning with altcoin ICOs, still I am fearing to invest with them as most of the new coin are being created for dumps after certain point of time.
Yes, investing into ANY new altcoin's ICO might risk your investments. You need to choose well concept backed altcoins for your investment. A blind investment is always dangerous, similarly choosing ICO without analysis would be very much dangerous.