just to clear you out , bitcoin itself or any other cryptos like eth , bch , xrp , etc is only a cryptocurrency . you cannot call them an investment but rather you can use them to be able to invest on other profitable activities .
@op you can invest your bitcoin on ico's becauase ico's are the most promising investments on this current year . you can earn a big bonus and perks when you invest as early as possible , plus you can sell you shares at the end of their project to earn again a huge profit .
Many of the ICOs are available at a cost lower than something you spend on other coins but they have weak projects and are not profitable in future as well. So I believe in the coins with good return.