Thanks all for the comment.
I agree that DCA concept is simple for average person to understand, so easier to adopt. But it is nonetheless you are investing on the underlying asset. A few have agreed with me on this. This is an important point.
And I think adopting DCA also means you take a view that the price is going to be upward in long term, as you are accumulating long position.
If you don't have time to learn or manage your investment, I don't agree that you should just adopt DCA as a way to get into a high risk investment and believe you don't need to spend much time and can still earn you more profit than other low risk options.
My thought is if you want to earn a higher profit than a low risk option, e.g. SSB, etc. You need to prepare to do homework and spend time learning about investment, not blindly DCA on a high risk investment and believe you will end up getting more profit than traditional low risk investment.
In order to get higher return, you are expected to spend time. I am not saying you need to monitor prices every day, but you will need to monitor your portfolio regularly and make adjustments.
If you don't have time to learn about investment, I would strongly suggest to keep out of high risk asset and focus your financial planning on low risk one, e.g. SSB, FD, or even high guaranteed return endowment plan (which itself is DCA isn't it?)