You can invest in cloud mining, for sure. Holding onto your bitcoins and hoping that he price will go up is just like hoping that the price of gold will go up, when it just fluctuates all the time.

If you invest in mining then you are still basically investing in bitcoin; however the returns are higher since in the meantime you are getting extra mining rewards.

The mining services I use are:

Bitmain's Hashnest and hashnet.co. They are two different companies. Bitmain's service has been around for a much longer time, and they are more established, but the returns are not as good as hashnet.co's

You are welcome to try both, but remember that is just my opinion.