In order to reduce the risks of cryptocurrency, you should remember to diversify. I think this is a good way to get rid of risks.
There is no perfect technique, even if we give it to fund managers who have decades of experience then there is no guarantee for profit, there is always a risk in investment so the best thing is to face not avoid.
Why you need fund managers ? Believe into many good strategies and techniques which are the simple way, you can manage your portfolio to eliminate the risk associated with any investing opportunities. I never believe it to any third party for managing my funds. It is really a harmful for our portfolio and our capital. If you learn some good techniques then you can manage profitably.