Theres no time when it comes on investment when you want to invest you don't need to pick a date or time when you want to invest if you really want to then invest if you don't want then leave the investment site alone that's it 
it likes your just stocking your bitcoin from there but to be honey it is too risk they're promising you to get good income when you invest but they like fooling you and getting your money = scam
it likes your just stocking your bitcoin from there but to be honey it is too risk they're promising you to get good income when you invest but they like fooling you and getting your money = scami think its only you that will know when the best time to invest, not just in bitcoin but in other investment programs. but before you want to make investment, please make sure that the money that you want to use is free money that you don't use for buying something or spend another expense. beside that, i hope before you determine what kind investment you want to use, you need to check if that investment is really good and reliable because if you make something wrong then you can loss all of your money.