It depends on how much do you want to earn .. If you want big profit you also need a big capital.. But as my observation here in this forum theres a lot of ico sale release they will promise you that they can double triple or more your capital .. Just buy when ico start .. Some of this are true but mostly are scam so be alert on what you click or invest in coin .. Just make some reaserch ask some pro traders for you to lessen the risky of lossen your money or capital