Of course it is a great opportunity and it will always will, the returns bitcoin is able to provide within a blink of the eye is quiet amazing and i don't see and i don't foresee any other opportunity like that.
Investing in bitcoin is amazing, if you want to be rich, then this is for you. It's look like close your eyes and if you open you're already got it, specially in 2016-2017. That's why many people used it as an investing not a payment system.