Biteminer looks relatively new its a website who has come online in about beginning of March so if they were to be like Hashocean they can continue a bit more online (don't invest 100% sure they are just some ponzi thieves) but if they are like Topmine they will close shop soon too and boom another cloud mining ponzi gone to dust. It really is not difficult to keep your bitcoins in your wallet, you just need to practice some patience exercise and try to stop the greediness inside of you, as this is the number one reason why you keep sending money to the ponzies. Also if you read a lot of forum topics in this very section and if you take them seriously , you have a high amount of chance of not losing a single cent anymore to these companies of sh it.