Probit is one platform that has had a lot of successful ieo in the past, reason why the exchange is  much sort after  by projects wanting to make sales. If you believe in a project, and the ieo is handled by probit, it is a plus in my experience. Binance didn't grow in a day, it takes time, and probit continues to grow on a daily basis. In terms of security, both your  new purchased assets and funds are guarded with equal security as normal wallets on the exchange . You are indeed safe with probit.