I started with Genesis Mining with a small amount of money and I am not happy with that company bcs of poor service. I miss several payouts and the service desk doesn't work at all. In comparism to Hashflare which has a good service and answers within 48 h. Beside this Hashflare has good graphical charts. I cannot recommend any of that companies at the moment because I am still testing. But as for this sensitive business a company MUST have an available service.