Can i use my iCloud storage like Dropbox?

It was recommended that I sign up for a Dropbox account to routinely upload the contents of my HD in the event of a crash as my machine is dated and on it's last legs. I am purchasing a new machine soon... But, I'd like to have a cloud backup plan in addition to my physical backups. As an Apple user... I think I'd rather utilize the service I'm familiar with. The cost is the same. But since I'm already in the family so to speak...

Any opinions suggestions?