I believe there is no "safe" way to make that happen as for every solutions provided, there will be presence of failure no matter how little. Even keeping it might lose value and would not even achieve the objective in a short while. But from my view here with adequate knowledge and enough spread one can meet the target by crowdfunding and also through crypto-trading.
It is quite risky to invest the bitcoin directly. Too many scam sites.
You just need to choose carefully. there's so damn many invesment out there which is successfully bring people a profit such as ICO ( ICO always use bitcoin as currency of investment) and lending ( for example : poloniex ). ICO could give you fantastic profit if the project is success and lending will give you small interests but you will not going to worry because it's an obvious safe