not all ICO projects are successful, but if one successful investment can profit and beat 9 problematic, why not.

as an illustration, suppose you have 10 ETH
and you are investing in 10 ICO Projects that you think will benefit both short and long term.

and fortunately you are lucky 1 big successful ICO project and you get 1000% profit from your investment.

then if there are 9 projects that failed. one good project can cover it all.

of course if you are lucky.